She will try to be a good person but secretly realizes that she actually loves the thrill and praise it brought her. She'll be caught in a balance of thinking she's not really being a proper white knight if she can't control her feelings, so tries to be more reserved, although other times can't help herself and her true colors come out. On one hand she beats herself up over it, while on the other she still gets a kick out of it and that frightens her. 

She might have some sort of holy energy at her disposal, which explains why she ressurects herself. Chaos energy seems like a very logical kryptonite to her so it doesn't even sound like a stretch.