Charlize's story is another example of how villains are made, not born necessarily. Her pain, humiliation, suffering for centuries as a sword has stripped her of a lot of human morals; after all, why care about people she doesn't know, when people she did know used her against her will or were used as bargaining chips to keep her in line? It's not right, but it's understandable how she acts. We don't have to agree with her actions, but I don't blame her for wanting to walk a path of destruction now that's she's on this nihilistic bender. What did morals do for her for centuries?
The 7th prince, however... he was just born this way LOL. Not villainous per se, but somewhat emotionally stunted? Between him and 2nd tl Charlize... they're both showing some psychopathic tendencies.