Draco Malfoy.
"Longbottom, if brains were gold, you'd be poorer than Weasley, and that's saying something."
"Well, I can certainly see why we're trying to keep them alive. Who wouldn't want pets that can burn, sting, and bite all at once?"
"You'll soon find out some wizarding families are much better than others, Potter. You don't want to go making friends with the wrong sort. I can help you there."
"I'm the new Slytherin Seeker, Weasley. Everyone's just been admiring the brooms my father's bought our team."
"Azkaban - the wizard's prison, Goyle. Honestly, if you were any slower, you'd be going backwards."
"Arthur Weasley loves Muggles so much he should snap his wand in half and go and join them. You'd never know the Weasleys were purebloods, the way they behave."
"I'd be careful if I were you, Potter. Unless you're a bit politer, you'll go the same way as your parents. They didn't know what was good for them, either. You hang around with riff-raff like the Weasleys and that Hagrid and it'll rub off on you."
"But I got this far, didn't I?" he said slowly. "They thought I'd die in the attempt, but I'm here... and you're in my power.... I'm the one with the wand.... You're at my mercy...."
"You don't know what I'm capable of, you don't know what I've done!"
"You move me, Kurt." ~ Blaine Anderson