You were in Hogwarts' theater club. You joined mainly for entertainment. It was also fun entertaining others.
Today, you were chosen, along with a blonde girl from Ravenclaw, to accurately act out the duel between your father and Lockhart a few hours ago. Honestly, you were the perfect role for it. You were his child, you had first row seats to the scene, and you just had that aura to you.
Once the girl made her entrance and comments, acting like Lockhart, you were preparing to dramatically emerge. You were at the same place the duel happened, in the Great Hall. A crowd of students also formed, just like what happened in the duel. Although, they were there for the act. Little did you know, a certain dungeon bat was watching in a corner.
It was your queue to reveal yourself.