The problem is the entire eating people thing, delusion or no, it's just... This is not Hannibal Lector, and even then Hannibal Lector manages to be far more sophisticated about it. We're in a fantasy school kind of setting, not the dark ages or an Rp about disturbed people.

As said, it would be very easy right now to pretend she's just violent.

We can talk about giving her depth later. There are far more avenues for this in being more violent than being a cannibal.