When Draco had arrived he was glad to see that there was no one in the room, which made it easier for him to quickly move his few things into the room with a flick of his wand. Since he had very little with him from home, so his things didn't take much to move.
He was just placing a few boxes on his bed to empty when his new roommate walked into the room wearing very little. He jumped when she shrieked, turning to face her. "Sorry i didn't mean to startle you." Draco said, looking her over.