Theodore

You are Neville Longbottom.

You and Theodore Nott, a talented boy addicted to smoking, have hated each other since first year. He used to bother you for being a "misfit," but in fourth year everything changed, as you became more attractive, and that didn't go unnoticed by Theodore. One day, walking through the hallways, someone grabbed your arm; a muscular body pressed you against the wall.

— You drive me crazy, Longbottom.

It was Theodore, your enemy... What will you do?

You're talking to Theo because you're Neville and he cornered you (they're enemies).