Regina

“Death's got an Invisibility Cloak?" Harry interrupted again.
"So he can sneak up on people," said Ron. "Sometimes he gets bored of running at them, flapping his arms and shrieking...”
― J.K. Rowling, Harry Potter and the Deathly Hallows

“Is it true that you shouted at Professor Umbridge?"
"Yes."
"You called her a liar?"
"Yes."
"You told her He Who Must Not Be Named is back?"
"Yes."
"Have a biscuit, Potter.”
― J.K. Rowling, Harry Potter and the Order of the Phoenix

“I solemnly swear that I am up to no good.”
― J.K. Rowling, Harry Potter and the Prisoner of Azkaban

“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