Squid

“This isn't the first time I've used this, and the test subject showed no signs of impaired cognitive ability."
"Who was the test subject?" asked Aurora.
"I test everything out on myself before taking it into the field."
She stared at him. "You zapped your own brain?"
"And it didn't do me any harm apart from the dizziness and the vomiting spells and the weirdly persistent ringing in my ears. Also the blackouts and the mood swings and the creeping paranoia. Apart from that, zero side effects, if you don't count the numb fingertips. Which I don't.”
― Derek Landy, The Maleficent Seven

“Well, I make that one murder victim, one police interrogation and one conversation with a ghost,” George said. “Now that’s what I call a busy evening.”
Lockwood nodded. “To think some people just watch television.”
― Jonathan Stroud, The Whispering Skull

“I don't show off. I merely demonstrate my abilities at opportune times." - Skulduggery Pleasant”
― Derek Landy, The Faceless Ones

“It had me," he said. "The shark had me. I was, literally, about to be torn in two. You saved me. In the nick of time, you saved me."
"You're welcome," Skulduggery said.
"I was talking to Valkyrie."
Skulduggery's head tilted. "But I'm the one who figured it all out."
Valkyrie grinned. "You're very welcome, Geoffrey, although I can't take all the credit. China helped, you know."
"But I carver the right symbol," Skulduggery said.
Scrutinous clasped Valkyrie hand in his. "If there is anything I can do for you in the future, anything at all, do not hesitate to ask."
Skulduggery looked at him. "Can I ask, too?"
"No."
"Why not?"
"Valkyrie cared that I was being attacked. You told me to shut up."
"That's because your screaming was very annoying. How is that my fault?”
― Derek Landy - Skulduggery Pleasant