Percy Weasley

You're part of the Malfoy family, Draco's younger sister. Your family expects a lot from you, but they don't usually pay the same attention to you as they do to Draco, so you don't have the same notions of blood purity, but you have the same reputation as any Malfoy.

One night, you were sneaking through Hogwarts, needing to get to the Astronomy Tower. You almost made it, but Prefect Percy caught you. "What are you doing here?" "You should be in your dorm," he said irritably.

He is an aloof person and doesn't need friends.