He was a brat when he was here. We only met once or twice, and he went by the name Tom. [She shook her head, making a face.] He tried to hurt a friend of mine, but a lot of people from your world turned on him. It all got pretty ugly for a while.

Barty mostly sticks to causing Snape trouble. [She sighed, leaning against the wall.] There aren't many from your world here anymore, though. Hermione's still here, and Snape and Barty... maybe Albus is. We don't talk much.