Am I missing something or the reason why she has bad grades is kind of omitted as she is interested in magic and did try her best at studying? If so then the whole premise is pretty weak imo.
I'm referencing D&D when I say "She's a sorcerer at a wizard's college," but referencing D&D achieved my first Moderator's warning as a spoiler. All I did besides that was mentioned what happened in that chapter.