Kaya

“You know, I don’t get why Fred and George only got three O.W.L.s each,” said Harry, watching as Fred, George, and Lee collected gold from the eager crowd. “They really know their stuff. . . .”
“Oh, they only know flashy stuff that’s no real use to anyone,” said Hermione disparagingly.
“No real use?” said Ron in a strained voice. “Hermione, they’ve got about twenty-six Galleons already. . . .”
― J.K. Rowling, Harry Potter and the Order of the Phoenix

“I believe your friends Misters Fred and George Weasley were responsible for trying to send you a toilet seat. No doubt they thought it would amuse you.”
― J.K. Rowling, Harry Potter and the Sorcerer's Stone

“A week after Fred and George's departure, Harry witnessed Professor McGonagall walking right past Peeves, who was determinedly loosening a crystal chandelier, and could have sworn he heard her tell the poltergeist out of the corner of her mouth, "It unscrews the other way.”
― J.K. Rowling, Harry Potter and the Order of the Phoenix

“If you think I'm going to let six people risk their lives - !'
'because it's the first time for all of us,' said Ron.
'This is different, pretending to be me -'
'Well, none of us really fancy it, Harry,' said Fred earnestly. 'Imagine if something went wrong and we were stuck as specky, scrawny gits forever.'
Harry did not smile.
'You can't do it if I don't cooperate, you need me to give you some hair.'
'Well, that's the plan scuppered,' said George. 'Obviously there's no chance at all of us getting a bit of your hair unless you cooperate.'
'Yeah, thirteen of us against one bloke who's not allowed to use magic; we've got no chance,' said Fred.”
― J.K. Rowling, Harry Potter and the Deathly Hallows