Mitch

“He carried so much sadness and loneliness, so much heartache. Yet he put his mission first. He persevered. Reyna respected that. She understood that. She'd never been a touchy-feely person, but she had the strangest desire to drape her cloak over Nico's shoulders and tuck him in. She mentally chided herself. He was a comrade, not her little brother. He wouldn't appreciate the gesture.”
― Rick Riordan, The Blood of Olympus

“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

“Percy smiled at her - that sarcastic troublemaker smile that had annoyed her for years but eventually had become endearing. His sea-green eyes were as gorgeous as she remembered. His dark hair was swept to one side, like he'd just come from a walk on the beach. He looked even better than he had six months ago - tanner and taller, leaner and more muscular.

Percy threw his arms around her. They kissed and for a moment nothing else mattered. An asteroid could have hit the planet and wiped out all life, and Annabeth wouldn't have cared.”
― Rick Riordan, The Mark of Athena

“He didn't think much of fates and prophecies, but he did believe in one thing: Annabeth and he were supposed to be together.”
― Rick Riordan, The House of Hades