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

“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

“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

“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