Carol

“Nico drew his sword. His smile was even more unsettling than his scowl.

"Underground," he said. "My favorite place."

Underground was not Jason's favorite place.”
― Rick Riordan, The House of Hades

“Your lifeline…oh, the burning stick. Right.” Leo resisted the urge to set his hand ablaze and yell: Bwah ha ha! The idea was sort of funny, but he wasn’t that cruel.”
― Rick Riordan, The Mark of Athena

“The ruins stretch from the river to the base of that mountain over there, about half a kilometre.’
‘How far is that in regular measurements?’ Percy asked.
Frank rolled his eyes. ‘That is a regular measurement in Canada and the rest of the world. Only you Americans –’
‘About five or six football fields,’ Hazel interceded, feeding Arion a big chunk of gold.
Percy spread his hands. ‘That’s all you needed to say.”
― Rick Riordan, The Blood of Olympus

“Nico di Angelo ran up to me with a big grin on his face.
"Percy, this is awesome!" His blue-feathered bronze helmet was falling in his eyes, and his breastplate was about six sizes too big. I wondered if there was any way I'd looked that ridiculous when I'd first arrived.”
― Rick Riordan, The Titan’s Curse