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What is so dangerous about the Hyperbolic Time Chamber?
When Goku, Gohan, Vegeta and Trunks prepare to train to face Cell Goku warns them that the Hyperbolic Time Chamber is dangerous enough that they can't train alone in it.
But there's no life in there. just a building and open empty white space. how exacting is it too dangerous to train in there alone?

My answer is only opinion based but i think it has to do with the fact that nothing is there besides white emptiness. The "danger" comes from the psychological nature, as a solo person would eventually go crazy without any object reference. Everywhere around you is just an endless whiteness so that most likely takes a huge effect to your mental state.
Anyway that is the only reason that comes to my mind.

The gravity inside the Time chamber is more than your average Earth.
What if someone fainted in the between of no-where? since it's vast.
It would be safer for two people to train at a time.

The conditions within the room's training area are extremely punishing on the body. 10 times Earth's gravity, temperatures that fluctuates rapidly between -40 and 50 degrees Celcius, and 1/4th the air pressure of Earth; try doing an intense workout while during arctic, desert, and high altitude conditions at the same time with extreme gravity added on top of it. Then you add the psychological toll of being in such an empty environment for extended periods.

The Hyperbolic Time Chamber has only one door for entrance and exit. If someone trains alone and go too far from the entrance, he will be locked there forever.


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Why does the Super Saiyan Transformation expose the Heart to Impurity?
In the Dragon Ball Series, it is noted that the transformation exposes the heart to impurity, which is the reason Goku cannot use the spirit bomb offensively. (While in SSJ)
In the Movie Super Android 13, he uses Super Saiyan while charging the Spirit Bomb, but it exposes his heart to impurity and the energy is absorbed within him. (Which is what happens when a impure heart  attempts the spirit bomb), but why exactly does the Super Saiyan Transformation expose the heart to  impurity?

I'm not exactly sure if my answer is what you asking for, but Vegeta tells 19 that when they turn into super saiyan they tend to be more savage. For transforming for the first time you have to be very furious, and probably full of hatred. That might be why Super Saiyan expose the heart to impurity, since to be pure-hearted means to be a person with only good intentions

Yeah, that's the answer I was looking for.

Every time someone obtains a new SSJ form, their personality always darkens the first few times they use it. Goku SSJ1 barely could maintain his sanity against frieza, and in one dub yelled at Gohan to leave before he lost what little sense of reason he had left. Gohan SSJ2 turned from fighting hating to torturing Cell, and Goku SSJ3 clearly showed anger in his face when he used it against fat buu.

Pure hearted doesnt mean "good" intentions. As vegeta mentioned when he himself got SSJ he was pure hearted.....pure evil.

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When did Donquixote Doflamingo eat his String-String Fruit?
I would like to know how long Doflamingo has had his devil fruit powers.

You can easily find your answer on google. One Piece's wikia page is particularly useful: http://onepiece.wikia.com/wiki/One_Piece_Wiki

He got his devil fruit from Trebol when he was 10 after he had awakened his  haoshoku haki and knocked out the people who were trying to torture him. This was also shown in the manga, chapter 782
Wiki qute :

When Doflamingo was ten years old, he awakened his Haoshoku Haki,
  knocking out a mob set out to torture him. Four young people — Vergo,
  Trebol, Diamante, and Pica — who would be the future elite officers of
  Doflamingo's crew, became awed by the rise of one who they deemed
  worthy to be their new king. Trebol offered Doflamingo power to be
  their king and to kill everyone who offended him, which took the form
  of the Ito Ito no Mi and an obsidian black pistol with luxurious gold
  plating (an ordinary pistol in the anime)

http://onepiece.wikia.com/wiki/Ito_Ito_no_Mi

Post a picture of the manga chapter inside a spoiler tag and the answer will be a lot better :) or a one piece wikia reference

There you go :)

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What is context of lone girl staring at field in the ending?
The ED of the second cour of All Out!! prominently features a lone girl (probably the team manager), seen from her back. She is looking onto a darkening field for well over 30 seconds. She is not moving, but the camera is. You can see this beginning at 23:05 of the provided link. The music seems sort of wistful, with a lone female singer. Through the latest episode (18), there has been nothing to provide this long take with a context.
Do the lyrics help explain this?  Since they are Japanese with no sub, I have no idea what the song is about. I do like the singer's voice and the mellowness of the music. If the lyrics are not relevant, maybe something later in the series will explain. To this point however, the manager has only had a peripheral role.  If manga readers know, please describe in a spoiler tag. At least I'll know to watch for it!

A lot of anime ending sequences are basically music videos; they have no context within the series or any kind of connection to the plot, and sometimes even show blatantly counter-factual things like two deadly enemies from a world of sword and sorcery playing around and eating crepes together in a modern-day shopping center.

@Torisuda Agreed. This could simply be a wistful mood piece, with the only (tenuous) connection to the plot being she is standing on a rugby field. 1: "We got no money and we got no time. We do have this song though." 2: The lyrics explain it. 3: A future episode features a major tragedy on the field. 4: ??


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Who was controlling the other Teddie?
After Rise Kujikawa accepts her Shadow and awakened her Persona a second Teddie appears. seeing it Rise warns that there is another presence and considering that Teddie

 is actually a Shadow

i figured someone else created and was controlling the other Teddie.
At first i thought maybe it might have been Ameno-sagiri since it talks about the fog, the voice is similar and Ameno-sagiri has been shown to be able to control others

 such as when Adachi is defeated Ameno-sagiri takes over his body

however the Other Teddie also talks about the futility in seeking the Truth when people are incapable of accepting it, this seems more like what Izanami says.
So i am wondering who was the presence behind the other Teddie?

Speaking from the view of someone who completed the game and watched the original anime. Teddy is basically a walking anomaly as he's a

 Shadow who became human after interacting more with people

Because of this his ego manifested reversely. In Persona 3 the concept of a controllable ego was something that only a select few people had.
However in Persona 4 all who enter the tv world must confront their ego and accept it in order to manifest a persona. Most people are killed by their ego instead.
Teddy, as he interacted more with the protagonist and the investigation team slowly began to ask himself things he never did before:

Who am I?
What am I?
Why am I here?
Where did I come from?

He slowly but surely realized the simple fact of what he was but refused to accept it. Because of that inner conflict he discovered his own alter ego which manifested and after accepting it he learned to wield the power of persona.
Most people fight to discover their inner-self he fought because he already knew his inner self and wanted to be different.
Because of that he along with Naoto and kanji has one of the 3 most interesting inner-conflict that is portrayed marvelously in his character development in spite of him being a "joke" character.
In respect to your last comment about Izanami, because of Teddie's origination it makes sense to infer that he had a closer connection to Izanami than the other character's shadows so the wordplay by both dialogues adds credibility to that hypothesis.


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Does Cocona's school correspond to any real-life building?
In several episodes, we see a shot of the main building of Cocona's school.

Does this building correspond to anything that exists in real life? So far, my searches for flip flappers real life have only generated lists of locations used in the Pure Illusion world of episode 7; I haven't found anything discussing the locations of the "real world" of the anime yet.

Based on a google image search it would seem to be a background based on the artist's imagination and experience.  To do an image search, open the image search page, and drag any image you want to the search bar.  Your image returned 5 pages of results, and from what I could read, all of them were general, "What beautiful backgrounds in Flip Flappers" type pages. But about 3 of those pages were non-English, so its possible one of them did specify a real-world location.


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Why do characters in K-ON refer to each other by given names?
In the anime characters seem to generally introduce themselves by their full names but immediately thereafter refer to each other by their given names. I haven't read the manga but I looked through the first few panels and Mio refers to Mugi by her nickname the first time she's mentioned, despite them having presumably met that same day.
As I understand it, it would be unusual for recent acquaintances to refer to each other by given name. Is there some kind of circumstance that explains this or is the immediate move to given names simply the author taking artistic liberties to establish the characters friendship more immediately?

they do become quite close as the series progresses but that wouldn't explain the closeness right off the bat. that might be attributed to the fact that the original manga was 4koma. i haven't read it myself yet but it's possible that the 4koma manga quickly went to the nicknames with them introducing each other preferring any nicknames.

Well.  They are all a bit "off" as far as normal people are concerned, so perhaps it just was a go with the flow thing.  And, as I remember it, no one complained, so there would be no reason to change the behavior would there?

The manga is the same on this point: the characters call each other by given name pretty much from the start. I think there are a few reasons, in-universe and out-of-universe, why this makes sense.
Mio and Ritsu have known each other since they were young, as we saw in an extra story in Volume 3, so it makes sense that they would already call each other by given name. Given Ritsu's personality, it makes sense that she would immediately jump to calling Yui and Mugi by given name, and neither of them are the type to object; Yui doesn't stand on formalities, and Mugi is always looking for ways to get closer to her friends. Azusa is an underclassman, so she would be getting the more familiar forms of address anyway.
Another thing to keep in mind is that time passes in strange ways in both the anime and the manga (but especially in the anime). Azusa appears in Volume 2 of the manga and Episode 8 of the anime, so an entire year passes in one volume / seven episodes. In the anime, Episode 4 covers the summer training camp at Mugi's villa; since the Japanese school year starts in early April, the girls have already known each other for at least two months by this point. Episode 7 is Christmas, so by now they've known each other for around eight months. If I were the writer in this situation, I wouldn't think it was worth it to have them all call each other by family name for five episodes and then suddenly have them switch to given names; it would be annoying and confuse the audience, who may not have taken the time to memorize everyone's given and family name right off the bat. (For instance, I've read the Genshiken original manga series about fifty times, but I couldn't tell you what Kugayama's, Tanaka's, or Kuchiki's given names are without looking them up.) Same thing if I were writing the manga; I would not have thought it was worth it to switch everyone's form of address halfway through Volume 1 when they've known each other for six months.

It's pretty common in "cute girls doing cute things" series for the main girls to all call each other by given name immediately upon meeting and forever thereafter. Everyone in Hidamari Sketch does it, even though Hiro and Sae are upperclassmen. (The Hidamari girls do use honorifics, though, unlike the K-On girls.) Same for Is the Order a Rabbit?, Kiniro Mosaic, Lucky Star, and Yuru Yuri. The only exception I can think of is G.A.: Geijutsuka Art Design Class, where everyone refers to Tomokane by her family name. My theory is that it fits the atmosphere these shows are trying to create. Part of the appeal to this type of series is the sense of being among a tight-knit group of friends, the kind of group where everyone speaks informally. It also makes the characters seem guileless and child-like; like children, they're living in a little bubble where social standing and deference aren't so important.
In more realistic anime, like Honey and Clover, or workplace-oriented shows like Wagnaria!!, characters call each other by family name as they probably would in real life. But for a show like K-On, realism is less important than creating an atmosphere, one which is harmed if the characters are too distant with each other. And the characters' personalities and prior relationships permit that sort of break from reality.


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What does the Jormungand system even do?
Maybe I was not paying attention in class, but it seems Jormungand is an autonomous AI system that destroys all aircraft indiscriminately once it has been activated. It indiscriminately robs everybody of air travel, even Koko. It would make sense if it could leave civilian planes alone or obey their operators.
With what weapons does Jormungand enforce "no air travel, ever"? Does it attack even low-altitude gliders? Is is completely indiscriminate, since it destroyed all aircraft at once? Can Koko override it?

From the Jormungand Wiki:

Its purpose was to end war and arms trade by closing off the skies for all air travel. If humanity was not completely discouraged from war, Jormungand would be adapted to denying sea and land travel as well.
How Jormungand could enforce aerial denial is unknown.

So is Koko directing it herself?

From what I understood of the explanations in the anime and manga, I believe the AI would hack into the systems of the planes and control towers and either reroute them to collide with each other, or cause a malfunction in the plane systems themselves to make them literally drop out of the sky upon activation, and disallow any other planes to take off.

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Were the 9 tails statues in Naruto legit?
So when Naruto was training to control the 9 tails, killer b took him to those statues where he said that if there was darkness in Naruto's heart, they would cut his head. When Naruto came out he said there was a switch inside and bee said "the statues were only there to scare him"
So were the statues legit? Did they really did the darkness detection, head cutting stuff? Could it be that they didn't detect any darkness in Naruto and let him pull the switch?
Or were they just meant as a horrible prank?

It doesn't seem legit, It more looked like a pranks as Naruto did to scare Yamato.

oh, so there was no darkness detection thing?

Actually, I think it was a self test for Naruto. Bee was smart, and even though he believed in Naruto (that bump fist thing) he needed to make sure that Naruto wouldn't use that Tailed Beast power for ill purposes. So, he told Naruto to insert his head; if Naruto had hesitated because of those ill-deeds in his mind, Bee would've instantly stopped his training.


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What is negative red/positive blue chakra?
Ok, so when Killer B was teaching Naruto the tailed beast bomb rasengan thing he mentioned the negative red chakra and the positive blue chakra. What does that mean? I thought there was only one type of chakra..
They haven't mentioned any negative or positive chakra before have they? Then what is it?

At first I found your question really confusing, but while answering another question I figured out the answer for this one.

In the manga, Yin Release, which is a type of chakra nature, was depicted as black but red in the anime.
In the manga, Yang Release, another chakra nature, was depicted as white but blue in anime.
Yin Release:

can be used to create form out of nothingness
genjutsu falls under the broad category of Yin Release.
Yin chakra is also part of the tailed beasts' chakra.
Yin Release can be used offensively when combined with senjutsu. However, it is unknown what exact role the Yin Release fulfils in said technique.

Yang Release:

can be used to breathe life into form.
Yang chakra is also part of the tailed beasts' chakra.
Whenever Naruto is in Nine-Tails Chakra Mode, Wood Release techniques react to the Yang chakra's vitalising properties and mature into full-grown trees within a matter of seconds, either through contact or close proximity.

Positive/Negative Chakra:

It's another differentiation in chakra, but it's not the same as Yin-Yang.
Black/Red chakra, Yin Release, is negative.
White/blue chakra, Yang Release, is positive.
The Bijuu Bomb is made from combining negative and positive chakra, not Yin and Yang.

Also, there is not just one chakra type.

so will thy explain this stuff later in the anime?

@MartianCactus, thy? "So will your explain this stuff later in the anime?".

Crystal release is not in the chart because its not canon on the same level as the others. The only user of it was a filler character. And if you truly never heard of Positive and Negative chakra, then why did you not read the section pointed out by OP where they were mentioned?

@Ryan, sorry. Just edited my answer. And I said I never hear of it before, but I had, I  just forgot.


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Question about the war strategy in the 4th great ninja war
So when Shikaku was explaining the war strategy, he said Mifune's company will go to assist Darui's company.
But then Mifune went to fight Hanzo and help the commando unit..how did that happen? I thought Mifune was supposed to help Darui...

What's confusing about it? I mean, during war you can still assist another division if needed.

In the 4th Great Ninja War, Mifune was apart of the 5th Division. This division was designed to support any other company that was in need of assistance. So he sent units to both Darui's and Kitsuchi's divisions.

Mifune is placed in charge of the Fifth Division. Because the Fifth Division is intended to reinforce the other divisions as the need arises, Mifune sends portions of his division to support the Second Division and First Division

However, Mifune fought Hanzo in the past and lost the battle

During their battle Hanzō's kusarigama broke through Mifune's sword and struck his head, poisoning him. With the battle finished, Hanzō expressed his beliefs to him, and, acknowledging his faith and strength, gave Mifune the antidote for the poison and left

Mifune wanted to battle Hanzō in the efforts to bring down the enemy that originally defeated him

Wishing to fight Hanzō by himself, Mifune instructs his samurai not to interfere.


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What will happen if one of the guardians (cloud, sun, rain etc.) dies?
What would happen if one of the guardians died in a fight with another mafia family? For example: the vongola rain guardian of the 8th generation dies and everyone else is still alive..
Would the family/the boss just search a new one and replace him? Or would the place stay "free" until the next generation of guardians/bosses will selected? if that's the case: would be the boss (of the vongola family for example) stay alone if all guardians die? or will he just select new ones and stay as the boss?

Very interesting question.


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Where there any other Master who didn't know their Servant's identity from the start?
In Fate/Zero it seems to be implied that all the Masters, from the moment they started working with them, knew the identity of their Servants.
i known however that

in Fate/Stay Night

Shirou didn't learn Saber's identity until much later because it was feared that if he was captured he wouldn't be able to defend against mind reading magic
Rin didn't learn Archer's at first because the summoning went wrong and messed up his memories however he continued to withhold it when he did remember who he was

in Fate/Extra

Hakuno didn't know the identity of his/her Saber, Archer or Caster until the final couple of weeks but i am not sure how many of the Masters they faced off knew their Servant's Identities at the start (though i get the feeling Rin, Leo and Rani knew)

so in all the Grail Wars (Fuyuki (Fate/Stay Night), Snowfield (Fate/Strange Fake), Moon Cell (Fate/Extra), Trifas (Fate/Apocrypha), Tokyo (Fate/Prototype), Caubac Alcatraz's Labyrinth (Fate/Labyrinth) etc.) where there any other Master who didn't know their Servant's identity at the beginning? if not at all?

If you just want them to be unknown at the beginning, then in Fate/Zero Uryuu did not know who his Caster ("Bluebeard") was.  Much like Shirou, Uryuu was not even aware that he was summoning a servant until Bluebeard showed up.  Unlike Shirou, he wasn't even aware that magic really existed.  He was just doing the ritual in the occult book he had for the fun of it.
While Bluebeard tells Uryuu his nickname of "Bluebeard" right away, it is unclear if Uryuu knows who this refers to.  I'm not sure if it is ever mentioned if Uryuu ever learned the true identity of his Servant.  They had a weird relationship, with Uryuu largely seeing Bluebeard as a kindred spirit and teacher, and they never really cared about the formalities of the war or what they were "supposed" to be doing in it.  They were definitely on good enough terms for Bluebeard to share the information, but they simply may not have cared about it.


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How could Jiraya use sage mode by holding his hands?
So Naruto can enter sage mode in a matter of seconds but he has to be completely still. But Jiraya could use sage mode with only using his hands but it took him a long long time to achieve it..why the difference?

You are not right with that Naruto can enter in sage mode in just matter of seconds, It also take time to gain sage chakra from nature for Naruto.
There are some condition to gain sage chakra from nature.

In order to gather enough natural energy to initiate the
  transformation into Sage Mode, the user must remain perfectly still.

To overcome this weekness, Jiraya use
Sage Art: Amphibian Technique, where one or more toads fuses with the user's shoulders and gather natural energy for them to use.
Where Naruto Use his shadow clone to gather nature energy and call back his clone to his original self to gain sage chakra. but there is limit of shadow clone he use is 5.
You can find more details here.

might want to add that the clasped hands for so long was a requirement for him to summon the 2 sage toads so that they could gather the sage chakra for him.

@Ryan I'd rather if you posted an answer which actually answers the question and not corrects just the mistaken assumption, i.e. The requirement for summoning the Great Toads (Though not explained why). Also to add on it, later he could just use Kurama to mould Sage mode Chakra, so doesn't need the amphibious technique.

@Arcane I don't see a real reason to post an answer that is this answer reworded plus 2 sentences. Besides, everything I would add is already in the links in the answer, I just recommended the most important one was included in the answer instead of by proxy through a source.

@Ryan I am mostly opposed to the "Fastest Gun Policy" on the SE Sites. Most of the information that we put in our answer is mostly ALWAYS on Wiki sites. The trick to a good answer is finding out the correct information and verifying first hand it is indeed correct. The answer above doesn't answer the OP's question, but a seperate question, example why does Jiraiya summon toads while naruto doesn't etc. However, I leave this to your personal discretion. Cheers~

@Arcane You are right most of information that we put in our answer is mostly in wiki sites, but I tried to put points which I thought is important and answered the question in more details explaining other things which might not relevant to question is no good & writing my theories without any reference is not policy of SE. & What if wiki site contain most of the information, I think no mater how many time you read one book you will find new things every time you read it again. Anyway this is my thought & everyone else has different. :)

@Ryan I think clasped hands are like hand signs for sage mode. & as we know Jiraraya didn't mastered sage Jutsu so he miight need to do hand sign as in ninja world some ninja need to use hand sign to perform jutsu and some not, depends on their individual skills( this is just what i think) & keep taking nature chakra in his body he needed to summon those two toads which is not possible in case of Naruto because of Kurama and Naruto come up with his own solution for that with shadow clones.

@VishalTarkar They are not. As explicitly told in the Amphibian technique. Shima and Fukasaku are the ones who gather sage mode chakra. It works because they dont move while on Jiraya's shoulders, and thanks to the merging process, can give him senjutsu chakra. "This also allows Fukasaku and Shima to continuously gather natural energy for Jiraiya, as he cannot do so himself while on the move"


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Does Dragonball super have only 1 underworld? Or one per universe?
One thing I'm not sure about with the introduction of the different universes is: Does Dragonball super have only 1 underworld/afterlife? Or 1 per universe?

If each universe has their own Kaioshins and God of Destruction, why wouldn't they have their own Hell?

I'm pretty sure that each universe has its own heaven and hell. We know that a universe is divided into four quadrants and each has its own Kai. Then there is the Grand Kai who governs them. After that we have the Supreme Kai who looks over the entire afterlife and the universe.
There is an extensive system of Kais to govern the entire universe, including the afterlife. It can be concluded that because each universe has its own Supreme Kai (and of course, the God of Destruction), it also has its own underworld.

I seem to recall Goku and the others telling Frieza its his own fault for coming to Earth for wherever he ended up (for him, it was hell, but where specifically was directly due to him being on earth). I do recall Earth has its own afterlife checkpoint. It seems oddly specific to Earth, so there is pretty good evidence its at least one per universe, though it could be more than one.


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What does (present) Rin mouth when she sees her father and her past self at the shrine?
At around 4:15 into Shelter, when present-Rin is witnessing her father and her past self visiting a shrine, she mouths something as her father walks past present-her. However, there is no voiceover here; the audio is just the piece "Shelter". What is she saying?
(I don't expect anybody will be able to lipread this, but maybe Robinson or someone else involved in the production has commented about it.)


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What is the relationship between the end of season one and the short season two?
Season one ended with the main characters leaving for some unexplained adventure.  But in season two, they're still hanging around the capital.  Does season two take place before the end of season one?

Actually, there is no season 2. Those 4 episodes were more like an OVA that Netflix mislabelled as season 2. Season 2 is coming, nobody actually knows the date when it's going to be aired.

You're basically right, but it isn't actually an OVA. The 4 episodes aired on TV. The closest description is probably "TV special" though they aren't that common.

What Netflix labeled as "Season 2" isn't exactly a new season, but rather special episodes from the Manga that aired on TV in Japan.

It seems like a continuity issue, to me. You are correct that at the end of Seaon 1, Elizabeth jumps on the Giant Boar and they all ride off, presumably to find Escanor the Lion's Sin of Pride.


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Is there any in-universe explanation as to why some CAD have to look like guns?
I understand plenty the visual effect of Tatsuya and Crimson Prince shooting magic bullets unto each other and other magical shooting plethora of effects.
But it seems to me that all those spells could be cast without those gun-shaped CAD wihtout much fuss.
Is there any explanation to why there are gun-shaped CAD, from the point of view of an advantage to the magician, or is it just for visual dramatic effect?

As far as I know, this is mentioned only in the light novels, not the anime:

The Specialized CADs are often shaped in the form of guns as they have the auxiliary aiming systems incorporated in the area corresponding to the barrel. Co-ordinate data is input at the moment the activation sequence initiates, in order to reduce the calculation load on the user. Psions aren't emitted from the muzzle.

(Taken from the wiki, which takes it from Volume 1 - http://mahouka-koukou-no-rettousei.wikia.com/wiki/Casting_Assistant_Device_(CAD)#Specialized_CAD)

Omry is correct and so, to answer your question more fully, there is technically no need for them to be shaped like guns. The auxiliary aiming systems could be incorporated unto a differently-shaped CAD but, as you suspect, it only helps slightly to have it in the shape of a gun. That being said, even a slight advantage can tip the scales (not that Tatsuya needs it).


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How can Naruto talk to the tailed beasts?
How could Naruto talk to the tailed beasts while fighting Tobi? Was it because he was friends with Kurama now? If yes, then how could he talk to 4 tails? Because at that time he hadn't befriended Kurama..

I guess, there exists a relam where all tail beast can communicate with each other, and naruto is able to enter in that realm. The thing about realm stated in realm when naruto is fighting against Madara.

It might be because He become friend with Kurama & as we know all tails are born from one 10 tail beast so it might be possible they can communicate in their physics. this is just my guess.

Wasn't it because he had part of their chakra? I'm pretty sure they mentioned something about Naruto having all of their chakra and all of them being able to talk to each other.

All jinchuriki have a inner sanctum and it's like telepathy. When the tailed beast acknowledge Naruto as an ally and kind hearted person the share their chakra with him


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Are there different types of sage modes?
Why are some sage modes evil and make the user violent like Jugo's clan and Kabuto's sage mode? And why is Naruto's sage mode "less dark" ? Are there different types of sage modes? They all use natural energy so shouldnt they be the same?

Yes there is different types of sage modes. I think there's one for different animals.

but..dont they all use natural energy? Then why the difference..?

They all use natural energy, yes. I think the animals they represent is the only difference, and the powers they get. Now remember, I'm saying "I think" as in it's my theories, you could say..

oh..but i still dont get why using natural energy transforms you into different creatures...how could using the same thing transform you to different creatures depending on where you learned them?

Yes there are different types of sage mode, depending on summons. But I think you're asking if there is like an evil sage mode. Well...to put in similarity terms: No. Sage mode is basically the opposite of when Naruto loses control over his tailed beast. You have to be in perfect control, and if you're not, you become literally an animal or stone, not some rampaging demon. Now this doesn't mean that Sage mode is only reserved for good guys. It really depends on the summon. If the summon you use is evil and wants to teach you sage mode for your evil reasons, by all means you can do that. Like Kabuto....and Orochimaru....

It could be argued that Jugo enters sage mode and it turns him into an insane murderer. He is somewhat unable to control his natural ability to absorb nature energy, and we all know enough nature energy transforms people.


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Are pilots produced but not released?
I know in American television production there are pilots that are produced, presumably as a proof of concept, for shows that are never aired. Or, alternatively, as with Sherlock on BBC, the released first episode wasn't the originally produced one.
Does something similar happen with anime, or are pilots only produced for shows that will definitely air?

IIRC these exist with manga, but I'm not sure how it works with anime.

As far as I know (but I don't know much, mind you), pilots in the American sense aren't really a thing for anime, but "pilot-y" productions do exist in some cases. Consider, for example, the initial OVAs for Little Witch Academia, Kyousougiga, or Death Billiards, all of which were kinda pilot-y, and were followed up by full-size adaptations. (@Maroon You're right - they do definitely exist for manga.)

A thing to note is that, unlike American TV shows, most (not all) anime are adaptations of existing works.  The examples @senshin gave are all original anime, but they are the exception rather than the rule. In some cases the anime is not even intended to make a profit itself but is commissioned essentially as an advertisement by the rights-holders of the original work. In such cases it would be surprising if a "pilot" of this style is needed, which probably explains the lack of such examples.

Sometimes American pilots are seen.  The original pilot (a 2nd was later made) for Star Trek was re-purposed to become part of the two-episode story called The Menagerie.  (If you don't remember the story itself, you probably remember the sexy green women and short aliens with big throbbing heads.) Also about two decades ago one of the American networks had a summer season show which consisted of pilots which never became series. // I agree with the others about anime pilots; with source material usually already existent, there is little reason to bother with a pilot.

Oh! I just thought of what I had thought was an anime pilot, but turned out to be an extended video ad for the manga. It may have later served as a pilot, however. See: What is the background of March Comes in like a Lion meets BUMP OF Chicken?

When director discuss with producer to create new anime, they will make multiple presentation for multiple plots.  for example, the wikipedia page for patlabor said they made a few presentation. They think other plot is better than patlabor but producer side picked patlabor. and they publish best one as novel.

Not really, since Most anime's are based on popular manga's already published.
Making a pilot in the US is byproduct of creator's who try to push their show to producers and executives.
If the manga is popular, the anime will no doubt be successful. This is not always the case in the US and Japan. "The Big O" was a miserable failure in Japan, but in the US was well received.

I can't think of many examples of pilot episodes for anime.
Not sure if this counts, since it was made to pitch to American TV networks, but there was a pilot episode produced for an English-language version of Space Adventure Cobra.
It re-used a few shots from the first episode of the Japanese TV series, but was made up of mostly unique footage, using an entirely new script that also had some modifications to some of the details of the plot.

The proof of concept for the animes are in the manga (most of the time). Take Naruto for example, in the pilot version Naruto is the son of the Nine-Tails Fox and the chief of the village (kind of the third Hokage) says he has the mission of getting a human friend to not turn evil like his father. It was a pilot that changed prior the manga to be better.

I am not sure that counts as there are bound to be anime that get a pilot episode that don't turn into a series.


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Where does "Accel World: Infinite burst" fit into the story?
I've watched the Accel World anime and have gotten through a couple of the light novels but am not up to date.
Does the new movie follow after the anime? Or should I read the light novels before watching the movie?

from my understanding Accel World: Infinite Burst is an original story like how Sword Art Online: Ordinal Scale is original though it could be like Ordinal Scale in which it is set where the anime currently finished

the anime covers the first 4 light novels, the movie takes place after light novel 21

Formatting, lack of evidence and it being a generally poor answer aside, it does answer the question quite succinctly.


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Why couldn't Minato store the nine tails in a different way?
Why couldn't in reality Minato store half of nine tails in Kushina and the other half in Naruto like in the filler ep 432? That way he and Kushina would have lived..
Or better, why couldn't he store the entire nine tails back in Kushina, prevent her from dying and sparing Naruto the trouble of becoming a jinnchuriki?

A lot of these are speculative, but the main thing is that when they protected Naruto, they took critical injuries and likely were not going to live after that. Minato knew the only thing he could have done to properly seal the 9 tails fast enough was the Reaper death seal. The thing is, That will kill the user, as the reaper takes their soul when its released. Orochimaru survived the reaper, but he summoned it using a mask instead of the jutsu, and it still cost him his body. Minato on the other hand, can't do any such thing, so him surviving this encounter is out of the question.
As for Kushina, besides the fact that she was set to die without Kurama, she still dove in-front of his claw, and it pierced her torso in what is likely a fatal injury. Combining such an injury with her weakened body, and its probably next to impossible to save her life. At that point, Both Minato and Kushina are guaranteed going to die, or at least believe so. Sealing Kurama in either of them will probably still lead to their death.
As for why he only sealed Half of Kurama into Naruto, As per This answer, He couldn't seal all of Kurama into Naruto. Minato's Wiki entry notes that it was because Kurama was too powerful to be sealed into a newborn infant.
Edit 1: OP added some concerns in a comment, Responding here:
First, Any time Kurama was resealed in Kushina was filler, and as filler does not need to follow in faith of canon, they could do anything, including contradict the canon content. Second, Kushina even volunteered to have Kurama get resealed inside of her, to drag both of them to death.

While still weakened, Kushina used her diminished chakra to restrain the Nine-Tails. Despite fearing the trauma would kill her in her current state, Kushina volunteered to have the Nine-Tails sealed back into her body so that it would die with her.

So all in all, Kushina was effectively on deaths door, and had no hope on being saved. She had just spent 10 months pregnant, given birth, had Kurama extracted, and was left in that dying state for up to a few minutes with no medical help. As we found out later on, Naruto survived, but unlike Kushina, he was still healthy, young and strong, and had Sakura, second only to Tsunade in medical prowess, constantly healing him (and help from Hagoromo). So it actually makes sense that he had a solid chance of survival from the resealing. Kushina on the other hand, had several major events drain her power, not including loosing Kurama, so her being strong enough to survive was low at best.
In that respect, He probably could have sealed Kurama back into Kushina, but it most likely would have still left her dead and freed Kurama. A free Kurama would throw the tailed beast balance off, causing war, and Minato did not want to take such a risk when a safe option was available. That safe option, sealing half of kurama into naruto, also had one major benefit in Minatos eye, the fact that he believed Naruto could be the child of prophecy Jiraiya spoke about, and Naruto having access to Kurama's power would greatly help him succeed (that is also brought up in the answer I linked earlier).

Still doesn't explain why Minato didnt seal the other half of the nine tails in Kushina like he did in the filler arc "Jiraya Ninja Scrolls"

@MartianCactus Took me a while, but I got around to add more details to the answer

I have same opinion here. But if you look more detail, actually in Episode 432 Kushina seal half of the kyuubi on her own and minato did the hakke fuin to seal the other half in Naruto. Which make a lot of sense, do you know that after bijuu extracted from a jinchuriki they can get back to alive if the bijuu reseal? Like what Minato did to Naruto when he lose Yang Kurama. But this happen when Kurama told Gaara that seal the other half would save him. In the case of Kushina, the only thing she know is that she'll died after reseal the kyuubi at her weakest point but in episode 432 Minato convince to seal only half. Minato gamble if she could survive and turn out to be true, she survived. And maybe that's why that kyuubi claw didn't hit them because after Kushina get Kyuubi power she immediately strengthen the Adamantine Chain seal so Minato could do the Hakke Fuin. I wish that was what Minato did. In Tsunade Dream filler Naruto still become Naruto and dream to become just like his dad, villager respect him just because he is hokage son but he gain  real respect after he save the village.

yes, but we wouldn't have gotten a beautiful anime like Naruto then :P

I'm not sure, but I don't think minato was powerful enough to do such a task, and I believe that Minatos plan was to keep Kushina alive but the main reason they both dies was because they both wanted to save Naruto.

Do you have any sources to validate your claim?

aahhh well, technically for the 1st part no but why else would minato sacrifice his life if he had another way? I don't remember the EP but they said that Minato wanted kushina to race Naruto with ought him.


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When does Naruto shonen jump end and shippuden begin
Just would like to know when or if the two series overlap and if so when should I watch Shippuden

unless i am misreading the question Naruto ends at the last episode of Naruto and Shippuden starts at the first episode of Shippuden, infact Wikipedia has 2 different list pages. if there is any chronologically "overlap" in Shippuden it would be in the form of flashbacks or fillers which would not be best viewed by watching then out of order

Also, isn't shonen jump a magazine, and not a naruto series?

@NZKshatriya Shonen Jump is a magazine

As a manga, Naruto is just one whole series, they just separated it into two series in the anime.

At age 12 or 13, Naruto goes with Jiraya to train and become stronger. That is when the Naruto series ends. 3 years later, Naruto returns to Konahakagure, and Shippuden starts.


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What is this Doc Tear Popper MAGES is looking for?
in Hyperdimension Neptunia Re;Birth, MAGES asks the party if they know were she can find Doc Tear Popper. what exactly is it?

She also calls it Doc Pop on occasion

Doc Tear Popper is a drink and a play on the name Dr. Pepper.
the character MAGES, like other human characters in the series, represents a real world games company, in this case 株式会社MAGES. one of the known games which ties into MAGES's own appearance is Steins;Gate which in the anime had product placement featuring the drink Dr. Pepper

I don't know however wether the obscuring of the name is some legal thing as Code Geass had it's Pizza Hut product placement removed in the English Release or if it's a joke like Vert's overheating in the original game begin a joke on the X-Box 360's initial cooling problems


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Why did Clow Reed create the Clow Cards?
I'm Cardcaptor Sakura it is known that Clow Reed created the Clow Cards and then set up an entire infrastructure to seal them until until Sakura could get to them because they were so powerful. It's been a while since I've read the manga or seen the show, and I'm wondering: why did he create the cards in the first place, particularly if they were going to be so much trouble to deal with after the fact.

I don't know the exact reason why Clow Reed created the Clow Cards. however i belive that they weren't created solely for the purpose to give to Sakura.
Cardcaptor Sakura is apart of a greater Multiverse in which other CLAMP Titles such as Tsubasa RESERVoir CHRoNiCLE and xxxHolic are set in. in that multiverse Clow Reed is known as the greatest magician of all time and one of his abilities is Prophetic Dreams

Clow possesses the powers of a Dream Seer, allowing him to see into the future. However, unlike most other characters, who could only see fragments of the future, Fei Wang stated that Clow can see everything, which gave him free reign to control events, hence how he had managed to foresee Sakura collecting the Clow Cards, making him create a Sealing Wand of the color pink for Sakura being a girl. He even knew that he would, as Eriol, cause problems for her to help her create Sakura Cards.

Source: Clow Reed - Powers & Abilites - Prophetic Dreams
ofcause if he foresaw Sakura sealing the cards and made the Sealing Wand specifically for her why did he let all that happen in the first place? the reason was that when he neared his death he had chosen Sakura (who had yet to even been born) to succeed him and most of it was by design.

When Clow was nearing death, he chose Sakura Kinomoto to be the new mistress of The Clow. Sakura was not yet born at the time, but Clow's magical ability allowed him to foresee most of the future and plan many of the situations that would enable Sakura to succeed in taking full possession of the Clow Cards. The reason why Sakura's wand is pink is that he wanted to make a suitable wand for the young girl who would be mistress. It wasn't because of chance that Keroberos chose Sakura.

Source: Clow Reed - Background (1st Paragraph)
as such the seal on the Clow Cards, while it did lock away the powerful magic that was the Clow Cards, it was only until it was Sakura's time to claim them and thus the reason why the book was in Sakura's home and not in Li's who is a blood decedent of Clow Reed.
The reason why i say that the Clow Cards weren't created just to give to Sakura is that in the first Cardcaptor Sakura movie Su Yung/The Madoushi, a former apprentice and lover of Clow Reed, was sealed inside the Book of Clow until Sakura unintentionally released her. while it is possible the Cards were created long after the Book of Clow considering the book's magical independent uselessness after the cards were released i would think that both the book and cards were created at the same time.

Please realize that Clow chose to "die" and was never dying. Su Yung is a dub only name for the Madoushi/Sorceress. The dub takes quite a few liberties, so it's canon is questionable. It's worthy to note that Eriol never attempted to free her even after reincarnating. It's likely that she was not part of the original outline of the cards and was just added on for the sake of the movie. The ongoing Clear Card Arc could possibly shed some light on the matter.

You cannot forget who Sakura are an indirectly decedent of Clow Reed.
As you can see on Anime (on the original manga they doesn't explain this, if I remember correctly), noone sees Clow Reed dying. But, Eriol tolds Sakura who Clow Reed separate his powers, giving them to Eriol and Fujitaka. Probably, bot of them are descendents of Clow, or a direct reincarnation.


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What is the exact purpose of the infinite Tsukuyomi?
What is the purpose of the infinite tsukuyomi, is it to make everyone dream in their ideal world? Then why does it turn people to white zetsu and steal their chakra?

The infinite tsukuyomi was actually a ruse by Kaguya, executed by black Zetsu, who manipulated Madara.
Kaguya, the origin of all chakra after eating the shinju fruit, became power hungry and was subsequently sealed up by her sons, who then went to distribute/teach the usage of chakra to the rest of mankind. However, through black Zetsu, she was able to manipulate mankind (namely Madara) into recreating the infinite tsukiyomi with the Eye of the Moon plan. In doing so she then would be able hypnotize everyone and reabsorb all of the chakra in the world which she deems "rightfully hers."

Not to mention that black zetsu's first victim was Indra Ootsutsuki

The jutsu makes little sense, in my opinion. Madara said he would use the moon to project his tsukuyomi on anyone who looks up at it. Yet, instead, the jutsu summoned a plant that trapped people within it. It ends up using an illusionary world to keep people from struggling as their chakra, and life, is stolen.


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Why did Madara and Kaguya stop the Infinite Tsukuyomi?
When both of them first cast it, the Moon was shining brightly but then the light subsided.
Then Madara came down to hunt Team 7. At that moment, if the moonlight was already absent then why didn't the once caught into the infinite Tsukuyomi escape out in the absence of the moonlight?
Same goes for Kaguya...why did she wake up some of the people that were caught in the infinite tsukuyomi and erase their memory when from the starting she wanted to use infinite Tsukuyomi to put mankind under a genjutsu?
When the moonlight stopped shining, shouldn't all the people in both cases escape out of the genjutsu?

I did not have information for Madara, but in case of Kaguya she voluntarily freed some people, as per this link, she did not want to perish the human race, also because of her power she was worshipped as goddess and began the "Ritual of divine tree" by which she collects the Chakara of people.
As per the naruto series all the chakra originated from the divine tree and Kaguya who ate the fruit and then used by all mortals in various forms.
Kaguya collects the chakra from ritual and provide it to the tree, thus to get more people she erase the memory of people she caught they will not know the past and eventually more people will be gatherd.
Check this link regarding divine tree and episode 460 plot

Everyone, bar Team 7, Madara, Zetsu-Obito, and the Edo Tensei dudes, were wrapped around in cocoons after Infinite Tsukuyomi. Even if the moonlight faded, they wouldn't be able to break out. Even the Edo Tensei Hokage tried to break the cocoons, but they kept regenerating.
Ichigo's answer regarding Kaguya is correct. I would just like to add that Kaguya's purpose for trapping people in cocoons was to turn them into her own personal army of White Zetsu, which could help fight back against Momoshinki and Kinshiki. Letting some of the human free meant that they could repopulate the Earth, allowing her to create more white zetsu once again.


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Art style choice?
I just watched the first episode of this anime and the plot seems pretty gripping but the art-style is what I found most interesting. It came out in 2013 so there weren't any technical limitations (at least that I'm aware of) but the animators decided to go with this style.
What is this style called? And does any one know why the designers used this as their style of choice?

Eh, I'm not completely happy that this was closed as a duplicate. While the answer on the other question does mention that this art style is called rotoscoping, all it says beyond that is that it's "essentially drawing over live action sequences". There was a lot more about it that could have been said on an answer to this question IMO. (By the way, rotoscoping used to be common in Western animation: both the old Max Fleischer Superman cartoons and Snow White used it. More recently, A Scanner Darkly also used it.)

I had read once that they used this style to accentuate the weird/creepy vibes of the show (haven't seen it), but it could also have just been an experimental thing. There've been even weirder animation choices before (see Gankutsuou: The Count of Monte Cristo)

Rotoscoping is an technique, not an art style, but everyone has their own take on rotoscoping.


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Why does Akira retain her memories of her experiences as a Selector?
In episodes 7 and 8 of Selector Infected Wixoss, Akira calls Ruko and Yuzuki to an abandoned building. Akira shows them the scar that appeared on her face after her third Wixoss loss and tells them that her wish was to destroy Iona. This exchange suggests that Akira retains her memories of her experiences as a Selector.
In contrast, after Hitoe suffers three losses, she does not recognise Ruko and Yuzuki after they find her on the street. Even when she looks at her Wixoss notebook, she is unable to remember Ruko and Yuzuki. This is in accordance with Hanayo's statement that upon three losses, the Selector will lose her memories associated with being a Selector.
With this in mind, why does Akira retain her memories? Perhaps Hanayo's explanation of the loss penalties was incomplete?

This is in accordance with Hanayo's statement that upon three losses, the Selector will lose her memories associated with being a Selector.

That is half true; Hitoe specifically lost her memories of being a Selector. Memory loss is not a consequence of losing three battles; the consequence is that the selector in question's wish becomes corrupted.
For Hitoe specifically, this corruption involved the loss of her memories of her friends and of being a selector (as well as experiencing pain from anything that would remind her of those memories), because her wish was to make friends, and she had already done so via WIXOSS battles.
For Akira, whose wish was for Iona's modelling career to be ruined, the corruption caused her own modelling career to be ruined via a facial scar preventing her from modelling.
Source: WIXOSS wiki


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Why did Minato's nine tails help in the fight?
I understand that Naruto's half of the nine tails had been befriended by Naruto but why did Minato's nine tails help? Wouldn't it make more sense that he would've resisted and didn't let Minato use chakra mode or tailed beast mode?

I would assume they bounded after death or something. I don't recall any explanation in the anime or manga

Dark Kurama (the half sealed within Minato) has a good reason to help them. His very existence is under threat by Uchiha Obito (and later Uchiha Madara) Eternal Tsukuyomi. If Obito's team win, he will be sealed into the Gedo Statue and returned to being a part of the Juubi. Regardless of whether the tug-of-war between Dark Kurama and Minato happened or not, Dark Kurama would still help Naruto's side so that at least he can still be him.
With the tug-of-war taking place, he is even more willing to help since he's been tamed by Minato.

He mastered controlling him and also dark Kurama had no reason to not help his other half since his existence was under threat of getting back to being a part of the juubi.

Kurama's other half is inside Naruto and moreover if obito captures Kurama he will be trapped in the gedo statue and Naruto has gained Kurama's respect by treating him as a friend.

It was explained that Minato mastered the tailed beast in the tug-of-war of chakra war and began controlling it just like Naruto did. He gained the same chakra cloak like Naruto had in the 4th Shinobi World War.

Where was this explained?


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Any important information I need to know if I'm skipping the filler episodes of Bleach?
I'm watching only the cannon episodes and am on ep. 111. However it seems that I missed a lot during the filler (i.e. the people with Kon.). Is this relevant information or something I should just look past?

related, especially the part that says "Some of the other episodes include original elements or reference events from filler episodes, but these do not impact the story in the long run so you can safely ignore them."

Feel free to look past the information given in the filler episodes. In Bleach, some of the filler episodes are original to the anime and some are adapted from the manga. Regardless of the source, crucial information isn't given in these episodes, I promise. If any information is referenced it's unimportant to the main plot and can usually be understood through context. If not, the confusion will be brief and fleeting. (Understanding these few moments is not worth the wasted time on the filler episodes.)
To be more specific to your situation, there aren't that many filler episodes before episode 111 anyway except the Bount Arc. It's mentioned a few times afterwards, but not in a way that will confuse you. (You'll understand through context that they were a group of people that attacked the Soul Society.) Some characters are introduced, like "the people with Kon" but as I'm sure you've noticed, they don't do much. You'll get the gist just by watching the non-filler episodes. Watch out though, as you get further into Bleach, you'll be skipping more and more episodes.


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Are there any major difference between Season 1 and 2 of Dragon Ball Super and the Dragonball Z movies they are named from?
Season 1 of Dragonball Z Super is Battle of Gods and Season 2 is Resurrection F, the same names as 2 Dragonball Z Movies.. now if we assume 20 minutes air time each episode for both series (- OP and EDs and possible ad breaks) this means

Battle of Gods

Series = 14 x 20 = 280 Minutes footage
Movie = 85-105 Minutes footage (theatrical-Fuji TV)

Resurrection F

Series = 13 x 20 = 260 Minutes footage
Movie = 94 Minutes footage

this shows that both season have more footage than their original movies. Are there any major difference between Season 1 and 2 of Dragon Ball Super and the Dragonball Z movies they are named from that would warrant someone who has been the 2 movies to watch the first 2 seasons.

There are some details that might be relevant in later developments of the story concepts or not, but how to tell you without spoiling you?

I'm talking about what I remember but generally if you watched the movies, skip the first two seasons because they are just a time waster and for the most part really boring.
In the first movie when Goku encountered Beerus he immediately switched to SSJ3 to fight him, where in the anime he fought in the SS1 and SS2 forms first. Also after the battle, in the movie Beerus mentioned that he was using 70% of his strength while in the anime he simply said he was not using all of his power. I'm sure there are some more details I have missed (oh yeah maybe another important one: in the movie they were fighting at the Capsule Corp headquarter while in the series the battle was on a cruise ship.
The second movie: most notable changes in the anime are that Ginyu swapped bodies with Tagoma and that Piccolo had died. Also there is a difference in how the dragon wishes were used but I don't remember how it went right.
If you plan to watch the series, as I said before you can skip the first 2 seasons, nothing major was changed and it is a real slog. Almost an entire episode was dedicated to Goku's transformation to a God. They literally stand in the circle for 10 minutes while he was transforming.

There are some details that might be relevant in later developments of the story concepts or not. For example

 In the movie , when wounded by Sorbet's laser , Goku is in Super Saiyan Blue, in the series he's in base form. This might be relevant or not to a story concept, to the idea of if a Super Saiyan Blue can lower his ki to base level or not. (It would seem in the series they fixed the idea that a Super Saiyan Blue could be hurt by a simple laser, but it's not clear.Another more relevant is in the series is shown Goku Super Saiyan God (red) have regeneration habilities, something that isnt show in the movie

Those are minor details that might be more important or not in the future, depending how the story concepts evolve
About differences that last long, there are several ones, for example

 Tagoma kills Shisami in the series. In the series Tagoma is shown to be extremely powerful, to the point of being able to fight Roshi, Krilin, Piccolo and Gohan in base form at the same time. Captain Ginyu appears in the series (it doesnt appear in the movie) and steals Tagoma body. Later Ginyu is killed by Vegeta . Gotenks has some intervention in the series fight, something that doesnt happen in the movie. Those are some of the differences.

In conclusion, worth watching the series in my opinion to see those differences I mentioned in the spoilers section of the post

BTW, the regeneration habilities shown in the series which dont exist in the movie, might make that form perfect to use it for a higher level of kaioken, even better than base form. If they had the intention or realize about that, we dont know, but Toyotaro in the manga uses to explore ideas like that, if you read the last chapter of the manga you'll know what I mean. And let's not forget Toyotaro who is running the manga is a former fan with a former Dragon Ball fan work, so it wont be a surprise if the fandom has a stronger influence over his ideas than it has over Toei or Toriyama


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Do the albums mentioned below cover all soundtracks of the series Naruto and Naruto Shippuuden?
Naruto:

Naruto Original Soundtrack I
Naruto Original Soundtrack II
Naruto Original Soundtrack III

Naruto Shippuuden:

Naruto Shippuden Original Soundtrack I
Naruto Shippuden Original Soundtrack II
Naruto Shippuden Original Soundtrack III

(I didn't mention the soundtracks from the movies or games as well as the main themes from the movies or the openings and endings from the series)
These were all albums I've been able to find. But unfortunately, I couldn't find Tenten's theme (it wasn't covered in an album but only as an individual track) which made me wonder if I did find all the tracks from the franchise.
On amazon.co.uk I've been able to find Tenten's theme as well as other themes which aren't covered in the albums above.
But since that album is titled "The Greatest Instrumental Themes from Naruto" I doubt that I was able to see every track of Naruto.

No. As an avid fan of the OST of Naruto and Naruto Shippuden, I can say that the soundtracks you mentioned don't cover all the BGM's in the anime. They only include tracks that are played regularly in stereotyped sequences. Like 'Will of Fire' is only played during flashback/sad sequences and 'Morning' is played all across filler episodes.
Having said that, there are indeed few BGM's which are not a part of the 3 collections you mentioned. Like the BGM from Naruto episodes 210-212 where Naruto and Todoroki are chasing to find Todoroki's brother and the Shinobazu hideout. The soundtrack played during those episodes is rarely repeated. So, it didn't make the cut into those volumes.

Is it possible to find these soundtracks which weren't implemented in the volumes somewhere? I don't know if it's true, but I've heard of cases in which these sort of soundtracks have been released as unofficial ones a bit after the release of the official volumes.


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What does the end of this segment of Lucky Channel reference?
At the end of the Lucky Channel segment in episode 5 of Lucky Star, Akira Kogami, raging because she won't be appearing in the main show despite the introduction of a new cute-little-girl-type character, says to her co-host Minoru Shiraishi:
"You know. Why don't we change Shiraishi Minoru's name to something else? Like Su-"
The segment then ends abruptly.
What, if anything, was this a reference to? What name did she intend on giving him? Googling the quote doesn't help, and I can't find it in the lists of references people have compiled for the series either.

According to the commens on NicoNicoDouga, it was "Sugita Tomokazu", who voiced Kyon in The Melancholy of Haruhi Suzumiya. Researching a bit more, Minoru also participated in TMoHS as voice actor of Taniguchi, Kyon's classmate. However, I'm still unsure what it refers to, but it seems they both were famous of their ad-lib.


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Krillin in Dragon Ball Super
How strong is Krillin in the latest episode against his fight with SSB Goku?
Is he as strong as Freiza in his 4th form?
He was able to hold SSB Kamehameha for a lot of seconds!
How is that even possible!

It's lame justification for him to be in the tournament, which they are positioning to be about strategy, not power level. Also, Goku can't kill him, so he can use any sort of Kamehameha he wants. Super Saiyajin Blue is a ki format. It need not have a fixed power level. It's the same as when Goku and Gohan exited the Room of Spirit and Time and remained SSJ for 9(?) days.

I haven't watched the universal tournament saga yet, but as @VISQL stated above SSB is a transformation that doesn't just raise the level, it changes the ki from conventional ki to god ki which can do anything you want with.
The main difference is ki control, remember SSB is a super saiyan with god ki. Meaning god control.

In the Fukkatsu no F movie Goku is almost killed with a laser weapon when in Super Saiyan Blue. So I guess in Super Saiyan Blue you can lower your ki even close to human levels


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Why did two hours pass before Kirika was asked to put away the pocketwatch?
In episode 1 of Noir, Kirika and Mireille speak at Kirika's home after surviving the attack at the construction site. After some initial discussion of Kirika's circumstances, Mireille prompts her to take out her pocket watch. Kirika complies and opens the face of the watch. This appears to start the melody that troubles Mireille, and the face of the watch reads 19h.1

After a shot of Mireille's troubled face, we see that the watch face has shifted to 21h05.

There is then a short flashback involving Mireille as a child, after which Mireille tells Kirika to put away the pocket watch.
Why did so much time pass before the pocket watch was removed, if Mireille has such a knee-jerk reaction to it? Is there anything that happens before the removal of the watch that the viewers are not being shown?

I considered the possibility that I had confused the minute and hour hands on the watch. However, that does not work with the layout of the clock face: if it were 00h35 and not 19h, the hour hand should be closer to the first tick on the pocket watch.


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Who is stronger, Naruto or Sasuke?
If there was an all out fight between Naruto and Sasuke, who will win?
Basically, who is stronger, Sasuke or Naruto?

this can be argued a lot, However according to the series it seems they are equally as strong.

The manga basically ends with them having an all-out brawl to the death.  They tie.  And almost bleed out.  Pretty definitive, especially given how that entire arc was about how they were two sides to the same, balanced coin, right down to their karmic inheritance.

@zibadawatimmy This should be cleaned up into an answer.

possibly naruto if he is very serious and micro-planner. however it is contrary to naruto's character

@Hansen You are the strongest, if you follow your ninja way

This will create a long debate. However, it is mentioned multiple times throughout the series that they have equal strength. Naruto knows this by exchanging fists with Sasuke, he specifically tells that to Sasuke in the Shippuden episode (spoiler alert!):

 Where Sasuke kills Danzo, and then goes after Kakashi by almost killing Sakura

In the end of the series, Kishimoto gives an answer to this:

 Naruto and Sasuke have an all-out fight to death because Sasuke believes in order to protect the world from evil, he has to cut all emotional ties. And, quote Sasuke, "[Naruto] you are my only friend". This battle ends with both of them losing an arm, and heavily bleeding until Sakura saves them.

It is implied that they both have equal strength.

Can we say that the two is the part of the same coin ?!? (the share so much and think so differently )


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Does everyone from Naruto's generation have chakra within them?
I think it's feasible to imagine some people out there in the world have been born without chakra during the time period where Naruto is alive. I say this because chakra as we learn in the anime was originally given to Hagoromo Ōtsutsuki during a time period in the history of Naruto where no one had chakra, after which she passed it on to her children. Therefore it's presumable that of the other people alive at the time some of them could have continued to have children without ever mixing bloodlines with those who had chakra all the way until Naruto's generation.
Now despite this I can see how considering how many generations it has been there's not likely to be many left who haven't attained chakra, but do you think they are there, and why were they never a plot point for the show?

Are you acutely asking about people in the Hidden Village itself who didn't have chakra?  The main reason I want to put a finer point on this is that this is getting close to supposition, and I'd rather have a question based more on concrete facts in the Naruto universe.  For instance, do you know of any characters who are explicitly stated to lack chakra?

@Makoto No I don't know any characters who are explicitly stated to lack chakra as that would negate the question, nor do I necessarily expect those without chakra would be in the hidden leaf village. That said, if you want concrete facts, then you have the multiple of episodes referencing Hagoromo Otsutsuki which talked about there being no one with chakra before Hagoromo Otsutsuki was given it by the tree. If you'd like then all of those characters from Hagoromo Otsutsuki's time could be considered to explicitly lack chakra.

I don't blame you for asking this question. It is hard to imagine how everyone could have chakra if Kaguya was the origin of chakra, and only a few people had actually descended from Kaguya. But there are some fillers that you have not seen that will explain how.
In one of the late Shippuden episodes, we see Asura Otsusuki, the grandson of Kaguya, teach a bunch of people ninjutsu while he was on a mission to supposedly find water. I think he spread chakra by "donating" it to people. It's either that or everyone has a chakra flow that was unnoticed before Kaguya, and she activated the chakra flow and started the concept of shinobi.

Didn't the sage of the six paths also travel the world to teach people about chakra and ninshu?

@Gravinco Yes he did. Though it was shown in the anime as filler, it was cannonicaly confirmed by Hagoromo himself about how he taught his sons and others Ninshu, which required chakra to fully work. "Hagoromo exemplified his teachings by distributing chakra meant to "connect" people's spiritual energies with one another. It would allow people to understand each other without communication" and " Indra Ōtsutsuki was the first to weaponise it into ninjutsu, Others followed his footsteps". When only 4 people alive were Ōtsutsuki, Others were using chakra.

The last bit of that answer seems a little convoluted. Is it definite that we should be assuming that everyone had an innate chakra flow before Kaguya and/or that people can donate chakra? Or is it still open ended as to whether everyone gained access to chakra and there could be a, dare I say it, Boruto episode where this is developed further?


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In in-universe time, how long did the "first" part of the movie last?
Vague title, I realize, but I don't want to spoil any passersby. Here's my question, spoilered to keep people browsing /questions from seeing it:

 How long was it from the first time that Taki and Mitsuha swapped until the last time (the day before the comet struck)? Relatedly, how long was it from when they realized they were swapping until the last time they swapped?

The sense I got is that it had to be a fairly long time (some number of months, perhaps), based on details like how they had pinned down that the swaps occur 2-3 times a week, and how each of them had gotten quite good at fitting into the other's life.
However, during the first scene that is set in Mitsuha's present with her in her own body, the TV news indicates that the comet is due to approach perigee within a month, and at this point, they hadn't yet figured out that they were swapping, which suggests to me that at best they could've had a few weeks where they were aware of the swapping phenomenon. (Granted, the swapping could've been going on for considerably longer with both of them still believing the swaps to just be vivid dreams.)
So the timelines seem a bit wonky to me. Can we pin down the duration of the "first" part of the movie more accurately?
I suspect that we should be able to get relatively tight bounds at least on how long they were aware of the swapping by examining the details of the diary entries Mitsuha was keeping on Taki's phone. (Or maybe this info could be found in the novelization?)

It's never stated. However, judging by the amount of different coloured diary logs in Taki's phone, it's likely to be that they switched for at least 2 months. The section where Zen Zen Zense plays can't be used as reference as it is unlcear as to when each event happened.
In terms, I'd say that they took a week of switches to realise the changes, and took another month getting completely used to it. Add a month after that, and that should fufill the timeline.

The wiki to the movie has a full timeline with as many dates and times as people could find: https://kiminonawa.fandom.com/wiki/Timeline#Story
According to it, the first switch was on the 3rd of September 2013/2016, the last regular one on the 2nd of October 2013/2016 (so exactly one month) and the very last one on the 4th of October 2013 and the 22nd of October 2016.


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Why did Madara pose as Tobi when with Deidara?
I'm confused about when we first meet Tobi. He becomes Deidara's partner and acts helpless. If he was Madara all along, why did he have to go through the process of getting accepted into the Akatsuki?
Examples: when capturing the 3 tails and when fighting Sasuke

First of all

Tobi is not Madara. He claims to be Madara, and everybody believes it, that's all.

Tobi's true identity is:

 Obito Uchiha. He pretends to be Madara because he does not want to reveal his true identity because he should already be dead.

He keeps his goofball attitude so

 that he can pretend to be someone else (Tobi),  but once everyone calls him Madara, he changes his attitude to serious.

So who did all the Akatsuki members think was the leader? When tobi was introduced for the first time, it was like he was a long time friend of Deidara who was trying to get into the Akatsuki

When Tobi (Obito) created the Akatsuki, he wanted everyone to think he was just another guy, so he made Pain the leader. Btw, it was also Nagato's dream to create the Akatsuki.

I'm pretty sure Tobi was able to pull that comic relief attitude, because he was encapsulated by spiral zetsu, who liked toilet humor.

Not so sure about that... :)


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Does Beatrice know about Return By Death?
During episode 7, Beatrice was contracted to protect Subaru. When she is with him on the cliff she suggests he "die where she can't see him" so she won't "have bad dreams," about it. Maybe she was being sarcastic, referring to the fact that he should die, suggesting Rem's death was his fault? I'm not sure if it was sarcastic, but it seemed to me like she was suggesting he kill himself to Return By Death? It sounded like she was conveying that he wasted his chance to explain himself to Ram, this time, but could kill himself and try again? Ah, I don't know... She says "I'll help you escape this domain"... What was she foreshadowing here? Does she know?

I'd say yeah, beatrice is kind of an enigma. Not only does her memory not get wiped when Subaru uses return by death. But she aims solely to keep out of his affairs. In spite of making a contract with him and then never bringing it up again. Also when Rem died due to the curse don't you find it odd that she was able to hold the master of the house at bay long enough for him to get away? Like how powerful is she?

It is because she is somewhat attracted to him (not in romantic means of course). Beatrice to some degree cares about him, otherwise, she would not agree to be in contract with him. That is why she said, "I you want to die, die at a place I cannot see. I don't want to have nightmare." Implicitly she is saying, "Don't let me see you die. I care about you, so if you die in front of me, I'll have nightmare about it."
That is why, rather than knowing about Return by Death, it is more like she cares about him and don't want him to die.

She was confused when Subaru seemed to show little fear or panic when hearing about his impending demise by the Wolgarms' curses. She really does seem to let on that she knows at times. But I am confident she does not. When she sent him away after the unseen hand crushed Emilia's heart, she knew that Puck would soon go on a rampage and end his life.


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Which music artist and manga artist/light novelist has the longest number of episodes working together?
Considering my other question, I started to wonder, which pair of music artist and manga artist/light novelist has the longest number of episodes working together?
For example, ClariS and Fushimi Tsukasa has worked together for 32 episodes in Ore no Imouto ga Konnani Kawaii wake ga Nai (16 in each season) as ClariS provided the OP/ED (forget which one) song for both seasons of it.

Can't confirm if it's the longest episodes but Kumiko Osugi sung Doraemon opening theme song Doraemon no Uta for 1199 episodes or more than 13 years

It was opening song by the way, for both seasons


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What was the working title of Kimi no Na wa?
Here is some early concept art for Kimi no Na wa.

The working title is given in the top-left corner of this image. What was the title?
(This question has been gleefully lifted from reddit.)

The title is 「夢と知りせば」 Yume to shiriseba, which one might translate as "Had I known it was a dream".
To appreciate the significance of this title, one should know that this is part of a tanka by Ono no Komachi, a Heian-era poet. In Japanese, the text is:

思ひつつ
  寝ればや人の
  見えつらむ
夢と知りせば
  覚めざらましを

There are many scholarly translations of this poem; here is Donald Keene's version:

Thinking about him
  I slept, only to have him
  Appear before me―
Had I known it was a dream
  I should never have wakened.

Shinkai mentions this poem as an inspiration in this interview:

その未来の物語を小野小町の和歌『思ひつつ寝ればや人の見えつらむ　夢と知りせば覚めざらましを』（訳：あの人のことを思いながら眠りについたから夢に出てきたのであろうか。夢と知っていたなら目を覚まさなかったものを）を引っ掛かりとして、アニメーションのフィールドの中で描く事が出来ると思いました。

As a side note, the text beneath the working title reads ―男女とりかえばや物語 - roughly, "boy and girl Torikaebaya Monogatari". The Torikaebaya Monogatari ("The Changelings") is another Heian-era work, about a boy and girl who each behave as members of the opposite gender. That's basically what Kimi no Na wa is, after all, except with full-on body-swapping.

Is there a manga for Kimi no Na wa ? I searched online and saw a few images which looked as if they were pages from a manga, but didn't find a place to read the manga itself. Is it even there ?

@Nightshade Yes, though I don't believe the English version is out yet.


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Where was Nunnally between the end of the Black Rebellion and her appointment as Viceroy of Area 11?
During the Black Rebellion we see V.V enter Ashford Academy to see Nunnally. shortly after, while Lelouch is interrogating Cornelia with his Geass C.C becomes aware of this and warns Lelouch. the 2 then leave Tokyo for Kaminejima Island. During this time we see a shot of V.V and Nunnally at the Sword of Akasha with V.V looking board.
2 Years Later when Lelouch had regained his memories Nunnally appears again, appointed as Viceroy of Area 11.
Where was Nunnally that entire time? was she confined by the Geass Order (as V.V was it's director)? was Nunnally aware or made aware of what happened to her?

was she confined by the Geass Order -- it is very likely. was Nunnally aware or made aware of what happened to her -- i don't think so. As her father also knows her whereabout (the fact that she was kidnapped by V.V.) it must be her father that deals with her later, as later she will be appointed as Viceroy.

Nunnally is aboard of Schneizel ship.

It's never explicitly stated where exactly, but before she traveled to Area 11 to become viceroy, she was in Britannia (her plane departed from the California base).
It's most natural to assume she was with the rest of her family in the capital Pendragon until she left in Turn 6


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What exactly is "Sakuga" and how it pertains to the animation quality?
Upon little research we can find the literal meaning of Sakuga,

Sakuga written as '作画' in Japanese has a literal meaning of 'working drawing' but generally is used to mean just 'animation'

i.e. it just refers to the animation.
However, it takes on a slightly different meaning in context of anime where it refers to exceptionally animated scenes as 'good sakuga'.
What I want to know is how is sakuga described as good or bad? Is it a subjective scale referring to the mix of factors such as direction, frames per second, cost of animation per second etc. Historical context would be a bonus for an answer!

Sakuga is basically where animators go from using cheats like only animating the mouth or skipping frames to animating every frame with fluid movement.

Sakuga (作画) (lit., "drawing pictures") is a term used in anime to describe moments in a show or movie when the quality of the animation improves drastically, typically for the sake of making a dramatic point or enlivening the action....
The other end of this spectrum, however, is when the animation becomes exceptionally expressive and fluid -- when every single frame is animated, and the movements themselves are closely-observed and realistic (or, failing that, spectacular to look at). This is what's known as sakuga. Action-oriented shows tend to have the most instances of sakuga, but there are many examples of dramatic shows using them as well -- for instance, to highlight an exceptionally emotional moment.
Opening and closing sequences of shows typically feature sakuga (which sometimes leads to jokes about that being where the majority of the animation budget is spent, especially if the rest of the show isn't as fluid). ThoughtCo

There's more information about it here and here.
"Good sakuga" seems to basically refer to sakuga animation that looks exceptionally fluid or realistic, or just looks cool. It's seems to be subjective, based more on what people think looks good than on any scale or mix of factors.
Pages like this give examples of what they think of as good sakuga, and from reading the descriptions you can see they talk about what would be referred to as cinematography in live action shows.


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What happened to Charioces XIV through XVI?
The king during the events of Rage of Bahamut: Genesis was Charioce XIII (he's introduced as such when Favaro and friends are brought before him in episode 6). The destruction wrought by Bahamut in episode 12 ends up killing him.
The king at the start of Rage of Bahamut: Virgin Soul, just ten years later, is Charioce XVII (introduced as such when he returns to the capital in episode 1).
That leaves a gap of three Charioces unaccounted for. What happened to Charioces XIV through XVI? Did Anati really have four different kings in the mere ten years following Charioce XIII's death?


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In Kimi no Na Wa., how long does the comet fragment take to reach Itomori Town?
In Kimi no Na Wa, Mitsuha is able to save everyone in the town even as the comet fragments were falling. So I'd like to ask, just how long would the comet fragment take to fall, in a timeframe that still allows everyone to reach the High School before the comet strikes?

Since it's a happy ending anime, the comet will wait for everyone to safely reach the school. Then it'll fall. As for the actual answer to your question, I don't know and would like to know as well..

Haha! I suppose. Let's see if anyone has an answer other than yours, 'cause it'll be interesting.

This is bugging me too - in the original timeline, the fragment seems to have impacted Itomori almost immediately (within a few minutes, say) after it split off. But in the revised timeline, it must have been at least an hour between the split (Mitsuha is still running towards city hall at this point) until impact (by which point evacuation would've been complete).

I agree with @Nightshade, it's an anime, don't think too much! :P

Personally I think the comet's fragment has gone through a full orbit around the Earth, because it is unlikely that it has diverted so much from the original comet trajectory (which is tangential to Earth) to fall almost perpendicularly, since the break was above Japan and the fragment also fell in Japan

So it is likely that more than an hour has passed between the break and the impact.
By the way, I'm not an aerospace engineer, maybe my reasoning does not make sense ^^

It reached its perigee at 7:50. At 8:52 it impacted. In the light novel, it was written that everyone stood in awe until it was to late.

Do you have a screenshot or page number for the source?


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is there any other human with non white / transparent ki in Dragon Ball aside Roshi's lilac ki?
In the advance of the new chapter of Dragon Ball Super , Roshi appears with lilac ki, perhaps the sign of a new technique or transformation. My question is, is there any other human in the Dragon Ball universe who has a non white/transparent ki/aura?

I think that the colour only indicates that master roshi is under an evil influence/transformation (maybe something will change in super but i doubt). Purple is usually one of the used colours for such an "evil" entity. Regarding humans i think they were only showed using a white aura

@proxy I just remembered Bulma and Chichi's auras. Chichi's red "kaioken" aura, though those appeared in humorous scenes, I dont know if they count as "ki"

Just remembered another one, Krilin's yellow ki, but that probably was an animation mistake since he was along Trunks and Goten super saiyans

as you have said, for chichi and bulma its just a gag scene there is no reason for them to have ki auras, especially bulma who has never trained any martial arts.


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What is the blue glow around trunks SSJ2?
Is it some sort of pre-God Ki that is going to eventually transcend him to the level of a God? And how was he able to even remotely fight black after Goku and his dad were already defeated?

I am 99.99% confident that no official explanation of the blue glow currently exists, so your speculation is as good as anyone else's.

There is no official explanation, but thinking it's god ki it's a decent speculation. Perhaps Trunks learnt something about god ki when he was training with Vegeta and faced Vegeta in Super Saiyan Blue

There is no official explanation, but manga #24 has given a very important hint that can possibly be the answer (spoiler)

 Trunks is officially a kaioshin apprentice, he can use kibito technique to heal other people, and since kaioshins have god ki, as kaioshin apprentice he probably has some grade of knowledge on god ki.

There is no official explanation. Even in the show none of the characters seem to care enough to question it. I like to call it SS demigod blue because that sounds cool. I'd say he just started to adapt blue god ki after feeling it from his dad and Goku. As for why this lets him fight evenly it's probably just cause there isn't going to be another arc involving him. He deserved to have this moment and the author just gave it to him.

When goku fought Beerus, Beerus said goku's body learned from the experience the power was now his and later goku revealed that vegeta learned to harness god ki without the ritual I believe with the saiyans ability to grow stronger after each battle that's how this was possible but with trunks being half human he won't be able to fully harness saiyans god ki fully but he learned from the experience of fighting a diety and was able to somewhat harness it or if he can fully use saiyan god ki this is the form in between regular super saiyan and the god forms because he is still learning to use god ki that's what I believe

Please include relevant sources/references. Specify specific anime episodes and manga chapters, if needed.


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Why does Arashigaoka Academy share a name with Wuthering Heights?
I am currently reading Aoi Hana, in which students at a girls' school put up a production of Wuthering Heights. Out of curiosity, I went to Google to determine whether the Takarazuka Revue ever produced an adaptation of the same. There apparently was; I noticed on a Wiki page that the Japanese title of the production (and thus, the novel) was Arashi ga Oka (嵐が丘).
This brought me to my question: Kureha attends Arashigaoka Academy (嵐が丘学園) in Yuri Kuma Arashi, so the name of her school must then be a reference to Wuthering Heights. Is there any particular reason why this literary reference fits?

Are there any specific parallels with YKA (whether the manga, the anime, or the light novels) that would make this reference appropriate?
Alternatively, is there something about the tone of Wuthering Heights that fits one part or another of the YKA franchise?

There's a Tumblr post that mentions: "Wuthering Heights is a convoluted novel about multi-generational abuse, manipulation, isolation, and obsession.". There's also Japanese fans' perception that "Yurika, Reia, and Kureha's models are from Wuthering Heights' Heathcliff, Catherine, and Cathy". Also, someone's theory on MAL forum.

@AkiTanaka I wonder if the same reading holds for the manga: if I remember correctly, the dynamics between characters are a bit different there (e.g. Yurika's relationship to the rest of the characters, Ginko's role, etc.).

I'm not sure about that one. All of the links above refer to the anime's, but maybe it's because the manga is less popular, and doesn't seem to be canon (I might answer your question about anime/manga disctintion some time)


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Was Re:Creators originally planned to feature fictional works that actually exist in the real world?
The basic premise of the anime Re:Creators is that when someone writes a book or scriptwrites a video game or something, they create an actual world where the events of the book/game/etc actually happen. Then, at the beginning of the show, some of the characters from those created worlds get transported into the "show world" (the world in which the main character [Souta] lives and in which the created worlds are works of fiction) by a Plot Device (the princess).
All of the created worlds are works of fiction that exist in the show world, but do not exist in the "real world" (the world in which you and I live), like Avalken of Reminiscence and Vogelchevalier and Magical Slayer Mamika.
I have noticed talk of a rumor (see e.g. here) that the created worlds were originally planned to be works of fiction that do exist in the real world, but that this plan fell through for one reason or another.
What is the source of this rumor, and how veracious is it? It sounds very truthy, almost to the point that I have to wonder if the source is some random guy who thought it would be cool if it actually played out that way and so originated the rumor.

Reading the unofficial character introduction (Japanese), I would say the resemblance is unavoidable, but until there's official source/interview, it might be just another parody/"respect"...

@AkiTanaka Yeah, I agree that many of the Re:Creators characters have a resemblance to characters from things like Fate, etc. However, that isn't quite the question I'm asking: what I'm interested to know is whether Re:Creators ever actually planned to use (for example) Saber herself in the show, or if the plan was always just to use a character who was an "expy" of Saber.

As cool as it sounds, I find it highly improbable. Someone might have gotten the idea at the start of the production, but simple thought about it makes it extremely difficult to pull off.
The major hurdle is licensing. Getting licenses to all the shows and characters would be massive undertaking and would take massive amounts of time, effort and money.
Next is getting authors of other works agree to have someone else write official story with their own characters. I'm sure most authors would not be fine having their own characters being written by someone else.
There is also a problem of fitting the characters into the story. Many popular characters have clearly defined personality and fitting that personality into the story might not be easy. And while many characters are clearly influenced or based on other fictional characters, there are none who would fit into the story exactly.
Another thing is fan perception. If characters from existing stories would be used, it would change canon as seen by fans. And it is not something authors of the originals might want. And it might take some twisting of the character's personalities to fit them into the story, resulting in outrage of fans at clearly out-of-character depiction of their favorites.
So no, I don't think this was ever a worthy idea during production of Re:Creators.