Harry Potter and the Chamber of Secrets
"Well, if you two are going to chicken out, fine," [Hermione] said. There were bright pink patches on her cheeks and her eyes were brighter than usual. "I don't want to break rules, you know. I think threatening Muggle-borns is far worse than brewing up a difficult potion. But you don't want to find out if it's Malfoy, I'll go straight to Madam Pince now and hand the book back in —"
"I never thought I'd see the day when you'd be persuading us to break rules," said Ron. (10.36-37)
Malfoy started taking pictures with an imaginary camera and did a cruel but accurate impression of Colin: "'Potter, can I have your picture, Potter? Can I have your autograph? Can I lick your shoes, please, Potter? [...] Saint Potter, the Mudbloods' friend," said Malfoy slowly. "He's another one with no proper wizard feeling, or he wouldn't go around with that jumped-up Granger Mudblood. And people think he's Slytherin's heir!" (12.171-175)
Professor Sprout set them all to work pruning the Abyssinian Shrivelfigs. Harry went to tip an armful of withered stalks onto the compost heap and found himself face-to-face with Ernie Macmillan. Ernie took a deep breath and said, very formally, "I just want to say, Harry, that I'm sorry I ever suspected you. I know you'd never attack Hermione Granger, and I apologize for all the stuff I said. We're all in the same boat now, and, well —"
He held out a pudgy hand, and Harry shook it.
Ernie and his friend Hannah came to work at the same Shrivelfig as Harry and Ron.
"That Draco Malfoy character," said Ernie, breaking off dead twigs, "he seems very pleased about all this, doesn't he? D'you know, I think he might be Slytherin's heir." (15.19-22)