Cai Xin

“Oooh, look, a Blibbering Humdinger!”
― J.K. Rowling, Harry Potter and the Deathly Hallows

“I don't think you should be an Auror, Harry," said Luna unexpectedly. Everybody looked at her. "The Aurors are part of the Rotfang Conspiracy, I thought everyone knew that. They're working to bring down the Ministry of Magic from within using a mixture of dark magic and gum disease.”
― J.K. Rowling, Harry Potter and the Half-Blood Prince

“A Wrackspurt . . . They’re invisible. They float in through your ears and make your brain go fuzzy,” she said. “I thought I felt one zooming around in here.”
― J.K. Rowling, Harry Potter and the Half-Blood Prince

“Hello' said a vague and dreamy voice from behind them. Harry looked up: Luna Lovegood had drifted over from the Ravenclaw table. Many people were staring at her and few people openly laughing and pointing; she had managed to procure a hat shaped like a life-size lion's head, which was perched precariously on her head.
'I'm supporting Gryffindor' said Luna, pointing unnecessarily at her hat. "Look what it does...'
She reached up and tapped the hat with her wand. It opened its mouth wide and gave an extremely realistic roar that made everyone in the vicinity jump.
'It's good, isn't it?' said Luna happily. 'I wanted to have it chewing up a serpent to represent Slytherin, you know, but there wasn't time. Anyway...good luck, Ronald!”
― J.K. Rowling, Harry Potter and the Order of the Phoenix