What is the relationship between Natsu and E.N.D?


From what I know, E.N.D is the most powerful demon created by Zeref. Zeref
tells Natsu to choose between life and death. He's practically telling him
that he'll have to decide if he wants to live or if he's going to kill himself
for the sake of the other’s. He'll want to die instead of hurting his friends.

Zeref said that Igneel wanted to kill E.N.D but couldn't.

So, What is the relationship between Natsu and E.N.D?




" _Who will be facing me ? Is it you or END ?_ "  
.

[Igneel Knows about Natsu
.](http://ladymoonstache.tumblr.com/post/78321997830/end-theory-dragon-
slayers-age-mysrery) He knows something but he could'nt about it.

this [article](http://ladymoonstache.tumblr.com/post/92247609213/full-natsu-
dragneel-is-e-n-d-theory-more) says about Natsu where Makarov hint about
Natsu's Ability .  
[this](http://forums.mangafox.me/archive/index.php/t-266949-p-5.html)  
  

That moment when Atlas meet Natsu.

E: Etherious  
N: Natsu  
D: Dragneel

About the [Prediction](http://www.fairytailbase.com/threads/e-n-d-and-natsus-
parents.14267/)

Chapter 373 - Death or Live  

> _Natsu : The Guy Igneel to wanted_  
>  Zeref : _to be precise the one he could'nt kill_ . Natsu : *I 'll defeat
> him * ![Z](https://i.stack.imgur.com/X7x3C.jpg)  
>  Zeref : You can do it .However remember one thing _Igneel could'nt kill
> him._ ![N](https://i.stack.imgur.com/NcIvN.jpg)
> ![i](https://i.stack.imgur.com/8z2z5.jpg)
> ![t](https://i.stack.imgur.com/IvspR.jpg)
>
> _Only You and End will be able get to me ._ \- _Zeref_

  
**Fan Art of Natsu Dragneel Becoming END .** ![Natsu is
END.](https://i.stack.imgur.com/ez6VR.jpg)




In chapter 436 it is revealed that, ...

> Natsu (Dragneel) is the younger brother of Zeref (Dragneel). Zeref's younger
> brother died a few years after birth. Unable to let go, Zeref researched
> everything he could find about bringing back the death
> ([R-system](http://fairytail.wikia.com/wiki/Tower_of_Heaven)), travelling
> through time ([Eclipse Gate](http://fairytail.wikia.com/wiki/Eclipse_Gate))
> and creating magical beings
> ([Etherious](http://fairytail.wikia.com/wiki/Etherious)). In the end (pun
> not intended), he combined all of his knowledge and created an Etherious
> version of his younger brother, using the original body of that younger
> brother, named E(therious) N(atsu) D(ragneel).  
>  
>  ![enter image description here](https://i.stack.imgur.com/3g8KA.jpg)  
>  
>  On a side note. This does not yet explain why Zeref was holding the book of
> E.N.D. in chapter 413. By holding the book, it would give the impression
> that E.N.D. is not yet summoned, which imho contradicts the above.

