Kyle

“Do you mean ter tell me," he growled at the Dursleys, "that this boy—this boy!—knows nothin' abou'—about ANYTHING?"
Harry thought this was going a bit far. He had been to school, after all, and his marks weren't bad.
"I know some things," he said. "I can, you know, do math and stuff.”
― J.K. Rowling, Harry Potter and the Sorcerer's Stone

“What's that?" he snarled, staring at the envelope Harry was still clutching in his hand. "If it's another form for me to sign, you've got another -"
"It's not," said Harry cheerfully. "It's a letter from my godfather."
"Godfather?" sputtered Uncle Vernon. "You haven't got a godfather!"
"Yes, I have," said Harry brightly. "He was my mum and dad's best friend. He's a convicted murderer, but he's broken out of wizard prison and he's on the run. He likes to keep in touch with me, though...keep up with my news...check if I'm happy....”
― J.K. Rowling, Harry Potter and the Prisoner of Azkaban

“The Death Eaters can't all be pure-blood, there aren't enough pure-blood wizards left," said Hermione stubbornly. "I expect most of them are half-bloods pretending to be pure. It's only Muggle-borns they hate, they'd be quite happy to let you and Ron join up"
"There is no way they'd let me be a Death Eater!" said Ron indignantly...."My whole family are blood traitors! That's as bad as Muggle-borns to Death Eaters!"
"And they'd love to have me," said Harry sarcastically. "We'd be best pals if they didn't keep trying to do me in.”
― J.K. Rowling, Harry Potter and the Half-Blood Prince

“Who're you going with, then?" said Ron.
"Angelina," said Fred promptly, without a trace of embarrassment.
"What?" said Ron, taken aback. "You've already asked her?"
"Good point," said Fred. He turned his head and called across the common room, "Oi! Angelina!"
Angelina, who had been chatting with Alicia Spinnet near the fire, looked over at him.
"What?" She called back.
"Want to come to the ball with me?"
Angelina gave Fred a sort of appraising look.
"All right, then," she said, and she turned back to Alicia and carried on chatting with a bit of a grin on her face.
"There you go," said Fred to Harry and Ron, "piece of cake.”
― J.K. Rowling, Harry Potter and the Goblet of Fire