When she’d make a reference to something, he was the only person in the room who knew what she was talking about. If she made a claim about an obscure spell, he’d scoff at her idiocy and challenge her claim by proposing a different (more correct) theory. If she had the audacity to state that axiom thirteen in Arithmancy was overhyped, he would gasp indignantly and launch into an argument that made their coworkers roll their eyes and leave the room.