It will become clear enough as everyone gets to know her - that Hermione is going to be a 'problem solver' of problems they didn't even realize they had. Cleverest witch in her generation, without a doubt. "Dark wizards ... well, we had a dark wizard - we call them mages here, or in this one's case, a maelficar, who was trying to save his son. He basically tore a hole into time itself - using magic that was only theoretical to begin with."

A witch. He blinked at her, before he gave her a second glance. Well ... all right. She seemed rather well organized for a witch, so perhaps witches were different where she came from. "Ah! I see ... and they invited you to learn how to do magic, and you agreed? Ah, what happens to those who don't want to become witches? How do they control their magic?"