[The troll seems to perk up the moment he hears her voice, as if it's familiar. So by the time she addresses him, he's already staring right at her. From the way she talks, he's starting to think she's in the same state of mind as her father, but at least she doesn't seem inclined to punch him in the face.

Wait- what did she call him? He thins his eyes at her, his fins flattening against his face as he does.]

Excuse me? Miss Lalonde, is that any way to speak to your professor? I hardly think that kind of language is appropriate for a young witch.