Well guess what, she's the boss here. Sort of. She's only a Prefect but the Headmistress lets her do whatever she wants. That tree better get to talking.

"Are you kidding? Have you looked at yourself lately? You're like a balloon. No, no, let me guess, you have one of those fun house mirrors that make you look really skinny. And I guess for you really skinny would be about normal sized."

She really doesn't like him.