The premise is pretty interesting. It reminded me the story of Joane D'arc. In short: Herogirl saves the world, the world doesn't need a hero anymore, political parties feel threatened because of the popularity and the power she wields, the king and the cronies decide to falsely accuse and exacute her and her follower to get rid of them. Yeah, I know, we did see the same premise before, but this one is written really well. Yes, there is quite a few "uh, oh society" mono/dialoges, so it is pretentious sometimes, but still the message is pretty much spot on. We have seen countless examples in the history where multiple countries united against a greater foe, yet they continued the hostility where they left off the moment the common enemy disappeared. It depends on your worldview though, but I personally do agree with the writer.
My only criticizm is that nearly all the human leaders (aka enemy) are portrayed as powerhungry crazy lunatics, which is not neccessarly far off the reality, but still it would be better if the writer would choose a more nuanced approach in the future. Also, apart from the protagonist the other characters in general are kinda cardboard cutouts (except maybe the succii girl), but since the MC is in the focus it is fine for the time being.
All in all it still need some polishing to became really memorable, but it has the potential to became one. I have to note though, it is clearly not for everyone, since it is pretty dark, and the MC makes a lot of morally questionable decisions for the greater good.
