ye she's a psychotic teen who kinda deteriorated and became crazy. She now likes to see people helpless, beat-up and bleeding and it gives her a lustful feeling. She can transform into someone using a portion of their blood which she would take using a syringe, the more blood, the longer the transformation. She is head over heels for Deku because she likes the way he looks when he's badly injured. Now every time they meet she tries her best to basically destroy him so she can see him like that again because she's crazy. I don't know her backstory, I stopped watching 2 episodes into ssn 5 because I was bord.