The world of Attack on Titan is key in the development of Eren.
Attack on titan is currently on a pause in his anime in what it takes to premiere the third part of its last season, this being now yes or yes the one that will put an end to the story of Eren and the rest of the members of the Exploration Corps. And it must be said that, from what has been seen in the manga, the nine chapters that remain to be adapted they promise to be extremely vibrant.
All this is because Armin, Mikasa, Levi, Jean, Reiner among many other characters have come together with the aim of stop Eren’s Rumble, leading this to the fact that until now was the main protagonist of the story has become the villain. And it is precisely this among other reasons that makes Eren a unique character and different from others in the anime world.
Eren has gone from being the protagonist to the villain in Attack on Titan
Although in the manga and anime we have become accustomed to protagonists who have suffered enough, the truth is that most have continued to maintain their ethics when carrying out their methods, an example of this being Tanjiro from Kimetsu No Yaiba, who even accompanies the demons he kills in his last breaths as a measure of redemption
This does not happen with Eren, this being a character that puts his morals above all else in such a way that having lived through all the traumatic moments of the series has led him to have only the desire to protect the people you lovebeing so that although in any other anime he could have had a normal life, in this case the access to the powers of the Founding Titan and the circumstances of his world have led him to commit one of the greatest genocides in fiction.
In this way, you can see the great difference between Eren and other protagonists, since he is the world itself that is against you, this being what will lead to the outcome of Attack on the Titans. We will have to be patient to see it materialized over time in the anime.