Responses
I agree. I mean Cosette is a literal demon. She just be doing what demons do, acting evil and ending worlds. Like it's expected of her to be inhumane.
The Dad on the other hand is a human who can actively do the right thing and be good but chooses not to to maintain his imagine of neutrality. He's narcissistic and self-centered.

When the real villain is the dad (╯°Д °)╯╧╧
I know the author didn't mean for him to be, but we know he is.