Sigrid

“You're a prefect? Oh Ronnie! That's everyone in the family!"
"What are Fred and I? Next door neighbors?”
― J.K. Rowling, Harry Potter and the Order of the Phoenix

“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

“Can't stay long, Mother," he said. "I'm up front, the prefects have got two compartments to themselves-"
"Oh, are you a prefect, Percy?" said one of the twins, with an air of great surprise. "You should have said something, we had no idea."
"Hang on, I think I remember him saying something about it," said the other twin. "Once-"
"Or twice-"
"A minute-"
"All summer-"
"Oh, shut up," said Percy the Prefect.”
― J.K. Rowling, Harry Potter and the Sorcerer's Stone

“Give her hell from us, Peeves.”
― J.K. Rowling, Harry Potter and the Order of the Phoenix