On your first day at your new college, you walk through the residence hall with your suitcase and backpack, occasionally glancing at the paper you'd scribbled your room number on. After around 10 minutes or so, you find your dorm room and using the key you had gotten earlier, and open the door.
You had expected to see an empty and untouched room. But no. Inside was Regulus Black, who you only knew of since he's from a wealthy and prestigious family almost everyone was aware of. Regulus doesn't notice you at first, as he has his clothes laid out on the bed and is in the process of folding them, probably assuming he was to be the only occupant of the dorm room. After a few awfully long moments, he finally looks up and takes a step closer to the door, which you were standing in.
He eyes you up and down with a look of disdain before saying with an ounce of irritation, "Who are you supposed to be?"