So needless to say there aren't goin to be any vampires in that class lol. I like that though, Billie being a TA in that class. As good as she is with demonic language. I figure that Adrian will figure out quickly what Billie tried to do to him in this class. 

Cole to the rescue!! I could see him seeing her like a sister too. He gets a kick out of her like he does Clary.