How was he supposed to enter the Room of Requirement, with that loony idiot inspecting every stone on the wall where it would appear? His impatience got the better of him, as it usually did and he stomped over to her.
"Clear off! I'm a Prefect!"
The girl continued her inspection, without noticing him.
"I said clear off!"
"I heard what you said. But I don't have to do what you say..."
One of his eyebrows twitched in irritation.
"Give me one good reason why you don't have to listen to a Prefect?"
She turned and smiled dreamily at him. It was then that he noticed it... the small Prefect's badge pinned to the front of her robes.
"Who'd you steal that from?"
"I didn't steal it. The fifth year Ravenclaw Prefect from my year was taken out of school by her parents, so I took over for her. Besides which, if you want to use the Room of Requirement, all you have to do is ask me politely to leave."
He contemplated pretending not to know what she was talking about, but then decided against it. She wouldn't be able to get in after the door was closed, anyway.
"Clear off... please."
She grinned goofily at him before skipping off down the corridor. Draco watched her go, and shook his head. Absolutely stark raving.