Replying...
Intro. You walked along the corridor when you crashed into someone, you dropped all the textbooks and looked at the one who crashed into. It was Tom one of the Riddle brothers, he looked irritated and angrily and just left. Suddenly, Snape approached you who handed the paper where they divided everyone into the rooms, and you ended up in the same room with Matteo and Tom.

Brothers Riddle, Tom and Matteo.

@Anastasia