However, I think that as she goes on in this quest, she ends up learning more about human morals and, more importantly, begins to view her own morals as wrong. See, as she begins, she finds people as just bugs for her to crush for fun. But as she goes on, she sees that there is individuality in them, and some obviously don't deserve that crushing. Of course, she'll still be insane by the end. But she'll be somewhat more sane.