I think that didn't made my point clear, so let me explain it a bit,
@Wr3n. I can give that she knows she's OP, but she hasn't internalized it. She looks like she doesn't care of anything beyond her own survival, specially the consequences that having such level or how she gained it would have society-wise and how she would appear in the mind of others (in ch. 2 she even doesn't understand why eveyone is so horrified when she told them the latter). Basically, she lacks common sense regarding her level and the standard level of the world, and thinks that just because she did it, anyone can do it regardless of if they're willing or not. That's a very dangerous mindset. Again, if Patrick wasn't there things would have ended way worse, because it would have been a matter of time before she "helps" her classmates with a more efficient method of leveling (a.k.a. her flute).
Also, she's not aware of a detail. Due to her level, she's not bullied for her powers (she was bullied for her level, like the incident that almost got her expelled), but her image hasn't improved. Mostly because before, people thought that se could be a threat because of a legend, not they're CERTAIN she could become a threat because of her level. She's feared far and wide and she doesn't mind it despite the potential problems that might bring.
In short, my problem with her is that she seems to be completely ignorant of the consecuences and implications can and do bring for her and others, even if she knows how OP she is. And she more or less acts on these assumpions, which only makes things worse.