Audrey just stares at Fabian.  His words are making it clear he's not a rider.  Really, it had been a poor assumption to believe he was... there are so many other people that reside in the academy.  But he had mentioned servants at home so he couldn't be one of the workers here.  And he'd said he was new, so he wouldn't be a professor's child.  She tried to place him, to figure out what he could be.  Then his mention of returning to the wizard's side is recalled..... was it possible? "Are you a... a wizard?" she asks with a certain amount of reverence in her tone.