As a starter question? You can start with their favorite spell. It would give you an angle to focus on, about the more specifics of one, which could lead to more about how it's learned, why it's learned, how common it is.

But figuring out the demeanor of the person at the very start might help more to.

[ she is brainstorming out loud at this point. ]

That's not a bad idea. Pooling resources seems like a solid plan for this place. [ there's a pause, where she finally remembers manners. ] I'm Annabeth.