She's a blood thirsty because of her quirk/power. She used to be seen as a monster in the past because of that but she found herself comfortable at the L.O.V (League of the Villains), for her they were all a big family. Until a traitor that was one of the "good" heroes named Hawks killed her brother figure Twice. For her it all ended, and she was going to go to war with everyone because the Heroe society is broken and no one realizes it.