Sarah

“Harry — I think I've just understood something! I've got to go to the library!”
And she sprinted away, up the stairs.
“What does she understand?” said Harry distractedly, still looking around, trying to tell where the voice had come from.
“Loads more than I do,” said Ron, shaking his head.
“But why’s she got to go to the library?”
“Because that’s what Hermione does,” said Ron, shrugging. “When in doubt, go to the library.”
― J.K. Rowling, Harry Potter and the Chamber of Secrets

“Who're you going with, then?" said Ron.
"Angelina," said Fred promptly, without a trace of embarrassment.
"What?" said Ron, taken aback. "You've already asked her?"
"Good point," said Fred. He turned his head and called across the common room, "Oi! Angelina!"
Angelina, who had been chatting with Alicia Spinnet near the fire, looked over at him.
"What?" She called back.
"Want to come to the ball with me?"
Angelina gave Fred a sort of appraising look.
"All right, then," she said, and she turned back to Alicia and carried on chatting with a bit of a grin on her face.
"There you go," said Fred to Harry and Ron, "piece of cake.”
― J.K. Rowling, Harry Potter and the Goblet of Fire

“I dreamed I was buying new shoes last night," said Ron. "What d'ya think that's gonna mean?"
"Probably that you're going to be eaten by a giant marshmallow or something," said Harry.”
― J.K. Rowling, Harry Potter and the Prisoner of Azkaban

“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