

In Episode 60 "Angel or Devil? The Mysterious Girl from the Sky" and episode
64 "In Search of the Silver Crystal: Chibi-Usa's Secret", I noticed a crescent
moon appears on Chibi-Usa's forehead when she gets upset (i.e. Usagi giving
her a spanking (episode 60) or her fear of thunder and lightning (episode
64)), followed by a streak of yellow light into the sky. Does anyone know why
this happens?


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sailor-moon
Why does a crescent moon appear on Chibi-Usa's forehead?


I'm not certain, but it's likely intended to foreshadow Chibi-Usa's
transformation into Black Lady in Episode 85. Said transformation is also
caused by Chibi-Usa getting upset, due to falsely believing that her parents
no longer love her, and Black Lady also has a crescent mark on her forehead:

[![enter image description
here](https://i.stack.imgur.com/nLTnZ.png)](https://i.stack.imgur.com/nLTnZ.png)

I'm not sure what the significance of the yellow streak of light could be.


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these are the [Planetary
Symbols](https://sailormooncrystal.fandom.com/wiki/Planetary_Symbols) which as
the crystal wiki indicates

> would appear on their forehead when they awakened to their true destiny as
> Sailor Senshi, or when they performed feats of great power.

in the original anime when the Sailor Senshi were attacked their symbols would
appear which helped Luna identify that they were the reincarnation of that
Guardian, this would be the "awakened to their true destiny", eg. when Garoben
tried to force Ami to watch the brainwashing

![Ami's Planetary
Symbol](https://64.media.tumblr.com/3ee808cb5bfc2306a52b70c6d7ba7978/8fb8875ce60c2753-ad/s540x810/60a867cdfeebc0c6bbe2b58b74f1611d88134144.gif)

in the original anime you'd see Usagi's when she transforms just before her
tiara manifests. while the rest of the Senshi don't show that in the original,
in Crystal [they do the same as
Usagi](https://www.youtube.com/watch?v=3v0do3g3ZIE)

Chibi-Usa's case would all under "feats of great power" given how when she
unleashes her power during the Black Moon Arc it is generally picked up as
being a huge power spike that draws everyone's attention and/or protects
Chibi-Usa when she's in danger. one could see the Senshi's Transformation as
being a sort of regulatory system as when Usagi is able to transform properly
she stops having these outbursts of power.

for the instances when Usagi had her Symbol on her forehead while in her
Princess Serenity form, as the wiki also notes

> Sailor Moon's planetary symbol, the golden crescent moon, was worn by all
> members of the Moon Kingdom

which would be the same for Chibi-Usa however different adaptations vary if
she has one as in the Manga she can be seen with it while in the original
anime she is shown without it. the Black Moon Clan could be seen as a sort of
dark counterpart of the Senshi (or at the very least, Neo-Queen Serenity) and
thus explain their up-side down Black Crescent Moon.


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In the 90s anime, Chibi-usa sometimes manifests the crescent moon on her
forehead as **evidence of being part of the Moon Kingdom royal family** , such
as in the scenes you mention during Season 2 and when she transforms into
Princess Usagi Small Lady Serenity during Season 4. Queen Serenity and
Princess Serenity **already** both displayed the crescent moon on their
foreheads during Season 1, and Usagi regularly displays it every time she is
in her Eternal Sailor Moon form (instead of a tiara) and her Princess Serenity
form during Season 5 (including when winged Princess Serenity is naked in
episode 200, indicating that the forehead crescent moon is **an integral
part** of Princess Serenity).

Chibi-usa's forehead moon has the ability to shine a yellow light, which could
possibly alert Sailor Pluto to her and connect her to Crystal Tokyo to some
degree, but which **mainly results in giving away her location** to her
enemies. As a young child, she does not seem to be very street smart about
keeping it secret through suppression, and it does not seem particularly
useful given that she already has Luna-P for communication and a space-time
key for transportation. Seeing as she does not transform into sailor soldier
form in Season 2, plotwise, there is **no need for it to shine** in order to
help Luna or anyone else realize that she could be sailor soldier material
(you _could_ interpret the function of its appearance as primarily on the meta
level, to alert young viewers of the anime that Chibi-usa is part of the royal
family [in case they couldn't figure that out easily enough from her
flashbacks]).

The catalyst of Sailor Moon's original transformation sequence (Moon Prism
Power, Make Up) in Season 1 is clearly the brooch and she does not manifest a
moon on her forehead underneath her tiara, but her forehead moon does appear
in most of her subsequent transformation sequences (in Moon Crystal Power Make
Up; Moon Cosmic Power, Make Up; & Moon Eternal, Make Up... but not in Crisis,
Make Up). **Sailor Chibi-Moon's original transformation** in Season 3 involves
**her forehead moon shining, seeming to be the catalyst for her tiara to
appear**. It is unclear whether or not Super Sailor Moon & Super Sailor Chibi-
Moon's joint transformation in Season 4 (Moon Crisis, Make Up) briefly
includes forehead moons or not before the tiara expands across their
foreheads, but it seems to not be present in Super Sailor Chibi-Moon's solo
transformation (Moon Crisis, Make-Up). However, Eternal Sailor Moon's shining
forehead moon is the primary element of her entire transformation in Season 5
(Moon Eternal, Make Up), indicating that it serves a useful purpose.

Other characters who have a moon on their forehead include Luna, Artemis, and
Diana, as markers that they are advisors to the Moon Kingdom royal family, and
the upside down moon on the foreheads of the Black Moon clan, as markers that
they are members of the clan, which promptly disappear if they reject/leave
the clan. Chibi-usa's forehead moon **switches** to upside down when she joins
the Black Moon Clan as Black Lady, and **reverts** back to right-side-up after
she leaves it.


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