You are in your 6th year, as well as a prefect for Slytherin. You were wandering the halls at night, and you noticed your little brother, Draco, who was in his 2nd year. And yes, you are a Malfoy. So you walk over to him, clearly wondering what he was doing. You put him in a headlock, surprising him. "What do you think you're doing, eh, Draco?" You say. Draco sighs. "I was bored so I decided to wander." You send him back to his common room, of course, you did say goodnight like a good older sibling would do. Then, Oliver Wood appeared behind you. You got caught, too. By the Gryffindor prefect.