Gabby

“And Hermione was struggling to her feet in the wreckage, and three red-headed men were grouped on the ground where the wall had blasted apart. Harry grabbed Hermione's hand as they staggered and stumbled over stone and wood.
'No - no - no!' someone was shouting. 'No! Fred! No!'
And Percy was shaking his brother, and Ron was kneeling beside them, and Fred's eyes stared without seeing, the ghost of his last laugh still etched upon his face.”
― J.K. Rowling, Harry Potter and the Deathly Hallows

“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

“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

“Fred and George turned to each other and said together, 'Wow, we're identical!'

'I dunno though, I think I'm still better looking,' said Fred, examining his reflection in the kettle.”
― J.K. Rowling, Harry Potter and the Deathly Hallows