Sarah

“I'm Draco Malfoy, I'm Draco, I'm on your side!"
Draco was on the upper landing, pleading with another masked Death Eater. Harry Stunned the Death Eater as they passed: Malfoy looked around, beaming, for his savior, and Ron punched him from under the cloak. Malfoy fell backward on top of the Death Eater, his mouth bleeding, utterly bemused.
"And that's the second time we've saved your life tonight, you two-faced bastard!" Ron yelled.”
― J.K. Rowling, Harry Potter and the Deathly Hallows

“Have you ever seen anything quite as pathetic?" said Malfoy. "And he’s supposed to be our teacher!"
Harry and Ron both made furious moves toward Malfoy, but Hermione got there first - SMACK!
She had slapped Malfoy across the face with all the strength she could muster. Malfoy staggered. Harry, Ron, Crabbe, and Goyle stood flabbergasted as Hermione raised her hand again.
"Don’t you dare call Hagrid pathetic you foul—you evil—"
"Hermione!" said Ron weakly and he tried to grab her hand as she swung it back.
"Get off Ron!"
Hermione pulled out her wand. Malfoy stepped backward. Crabbe and Goyle looked at him for instructions, thoroughly bewildered.
"C’mon," Malfoy muttered, and in a moment, all three of them had disappeared into the passageway to the dungeons.
"Hermione!" Ron said again, sounding both stunned and impressed.”
― J.K. Rowling, Harry Potter and the Prisoner of Azkaban

“You think I'm a fool?" demanded Harry.
"No, I think you're like James," said Lupin, "who would have regarded it as the height of dishonor to mistrust his friends.”
― J.K. Rowling, Harry Potter and the Deathly Hallows

“Luna had decorated her bedroom ceiling with five beautifully painted faces: Harry, Ron, Hermione, Ginny, and Neville. They were not moving as the portraits at Hogwarts moved, but there was a certain magic about them all the same: Harry thought they breathed. What appeared to be fine golden chains wove around the pictures, linking them together, but after examining them for a minute or so, Harry realized that the chains were actually one word, repeated a thousand times in golden ink: friends . . . friends . . . friends . . .”
― J.K. Rowling, Harry Potter and the Deathly Hallows