" Someone could call themselves a hero and still walk around killing dozens. Someone else could be labeled a villain for trying to stop them. Plenty of humans were monstrous, and plenty of monsters knew how to play at being human. The difference between Victor and Eli, he suspected, wasn’t their opinion on EOs. It was their reaction to them. Eli seemed intent to slaughter them, but Victor didn’t see why a useful skill should be destroyed, just because of its origin. EOs were weapons, yes, but weapons with minds and wills and bodies, things that could be bent and twisted and broken and USED. "
― V.E. Schwab , Vicious (Villains, #1)