Lilly

“We did it, we bashed them wee Potter's the one, and Voldy's gone moldy, so now let's have fun!”
― J.K. Rowling, Harry Potter and the Deathly Hallows

“So top grade's O for 'Outstanding,'" Hermione was saying, "and then there's A-"
"No, E," George corrected her, "E for 'Exceeds Expectations.' And I've always thought Fred and I should've got E in everything, because we exceeded expectations just by turning up for the exams.”
― J.K. Rowling

“You could say sorry," suggested Harry bluntly.
"What, and get attacked by another flock of canaries?" muttered Ron.
"What did you have to imitate her for?"
"She laughed at my mustache!"
"So did I, it was the stupidest thing I've ever seen.”
― J.K. Rowling, Harry Potter and the Half-Blood Prince

“You should write a book," Ron told Hermione as he cut up his potatoes, "translating mad things girls do so boys can understand them.”
― J.K. Rowling, Harry Potter and the Order of the Phoenix