Christina

“Blackjack," Percy said, "this is Piper and Jason. They're friends."
The horse nickered.
"Uh, maybe later," Percy answered.
Piper had heard that Percy could speak to horses, being the son of the horse lord Poseidon, but she'd never seen it in action.
"What does Blackjack want?" she asked.
"Donuts," Percy said. "Always donuts.”
― Rick Riordan, The Mark of Athena

“Legion, cuneum formate!’ Reyna yelled. ‘Advance!’ Another cheer on Jason’s right as Percy and Annabeth reunited with the forces of Camp Half-Blood.

‘Greeks!’ Percy yelled. ‘Let’s, um, fight stuff!’ They yelled like banshees and charged.

Jason grinned. He loved the Greeks. They had no organization whatsoever, but they made up for it with enthusiasm.”
― Rick Riordan, The Blood of Olympus

“Hera: Ohh, Thalia Grace, when I get out of here, you'll be sorry you were ever born.
Thalia: Save it! You've been nothing but a curse to every child of Zeus for ages. You sent a bunch of intestinally challenged cows after my friend Annabeth
Hera: She was disrespectful!
Thalia: You dropped a statue on my legs.
Hera: It was an accident!
Thalia: AND you took my brother”
― Rick Riordan, The Lost Hero

“I don't feel that way anymore," Nico muttered. "I mean... I gave up on Percy. I was young and impressionable, and I- I don't..."

His voice cracked, and Jason could tell the guy was about to get teary-eyed. Whether Nico had really given up on Percy or not, Jason couldn't imagine what it had been like for Nico all those years, keeping a secret that would've been unthinkable to share in the 1940s, denying who he was, feeling completely alone- even more isolated than other demigods.

"Nico," he said gently, "I've seen a lot of brave things. But what you did? That was maybe the bravest.”
― Rick Riordan, The House of Hades