Maybe she is a member of the anthro/furry community? Part of the description sounds similar-that she believes she is a wolf. Anthro people believe they have an animal spirit-a "fursona"-in them, and a lot of them will draw/write about themselves as these animals.

But all the same if she is being violent to other people, it would be best for everybody that she sees someone about it. Why did she bite the other person?