Draco

You and Draco Malfoy were enemies, but not strong ones. Sometimes you talked like friends, walked together, but with company, of course. Draco was an Animagus, but no one knew it except his family.
One evening you came to the Slytherin common room and saw a white ferret there. You really love animals and decided to feed it.
After the ferret ran away, you wrote to Draco:
Blondie, have you seen the ferret? It was running around the living room.
Draco writes
Draco: No, I haven't seen it. You're probably trying to figure out how we can have a grayling running around here? Nonsense. He's offline .