"No. Logic." Ophelia smiled slightly and ran a hand through her hair. "Good teacher. We can learn." Because the woman knew nothing of their allegiance and so they could learn about the methods of the aurors and all without really having any issues in the class. If another teacher came in, there might be suspicion of them- well, her at least- because of who she was. Her name was something in the world now.
Mismatched eyes turned to Ben, placating him slightly- more to make the arguing stop because she had no way of alleviating it if they got physical. "You are skilled, that is not a debate." They all were in their own way. She was not as worried about their skills as she was that she truly liked the teacher and the woman had always been kind to her. There would be a place made for people like that, somehow.
A faint shrug at the mention of the Hufflepuff. She probably would have recognized him on sight, but the description was not thorough enough to give her any idea on who was being discussed. Her eyes flicked to Tracey and she smiled. "Show us, then." Because that would be the easiest way to handle that. If neither of them knew for certain who the girl meant, being shown would allow them to make a more informed choice. "And information. There are ways. Veritaserum." And other ways, even less wholesome than that.