Rhiannon

“Well, you can't break an Unbreakable Vow...."
"I'd worked that much out for myself, funnily enough. What happens if you break it, then?"
"You die," said Ron simply. "Fred and George tried to get me to make one when I was about five. I nearly did too, I was holding hands with Fred and everything when Dad found us. He went mental," said Ron, with a reminiscent gleam in his eyes. "Only time I've ever seen Dad as angry as Mum. Fred reckons his left buttock has never been the same since."
“Yeah, well, passing over Fred’s left buttock —”
"I beg your pardon?" said Fred's voice as the twins entered the kitchen.”
― J.K. Rowling, Harry Potter and the Half-Blood Prince

“Hello, Professor McGonagall,” said Moody calmly, bouncing the ferret still higher.
“What — what are you doing?” said Professor McGonagall, her eyes following the bouncing ferret’s progress through the air.
“Teaching,” said Moody.
“Teach — Moody, is that a student?” shrieked Professor McGonagall, the books spilling out of her arms.
“Yep,” said Moody.
“Moody, we never use Transfiguration as a punishment!” said Professor McGonagall weakly.”
― J.K. Rowling, Harry Potter and the Goblet of Fire

“Harry Potter isn’t real? Oh no! Wait, wait, what do you mean by real? Is this video blog real? Am I real if you can see me and hear me, but only through the internet? Are you real if I can read your comment but I don’t know who you are or what your name is or where you’re from or what you look like or how old you are? I know all of those things about Harry Potter. Maybe Harry Potter’s real and you’re not.”
― John Green

“You will also find that help will always be given at Hogwarts to those who ask for it.”
― J.K. Rowling, Harry Potter and the Chamber of Secrets