"Ahem!" Shouted a balding man from the corner of room. He watched as all three of the students jumped and turned their heads toward the mysterious voice.
"There may not be anyone else in here, but we are trying to sleep!" The old, crinkly man was painting a picture of the portrait he, himself, was in. "The rest of us," he motioned towards all of the other pictures, most containing people with angered faces, "are very tired, and would like a bit of peace! So, if you don't mind, would you please take this little party to another part of the castle!" He pointed out of the common room with his left hand, the hand without the paintbrush.
"Oh, also, you! The brown-haired one," he shot a furious finger at Grail, "I think we would all appreciate it if you would stop taking midnight strolls in our homes!" The man whipped around and continued the portrait of himself.