Katharine

“And,” Annabeth continued, “it reminds me how long we’ve known each other. We were twelve, Percy. Can you believe that?”
“No, he admitted. “So…you knew you liked me from that moment?”
She smirked. “I hated you at first. You annoyed me. Then I tolerated you for a few years. Then—”
“Okay, fine.”
She leaned in and kissed: him a good, proper kiss without anyone watching—no Romans anywhere, no screaming satyr chaperones.
She pulled away. “I missed you, Percy.”
Percy wanted to tell her the same thing, but it seemed too small a comment. While he had been on the Roman side, he’d kept himself alive almost solely by thinking of Annabeth. I missed you didn’t really cover that.”
― Rick Riordan, The Mark of Athena

“It's okay,” he said. “We're together.” He didn't say you're okay, or we're alive. After all they'd been through over the last year, he knew that the most important thing was that they were together. She loved him for saying that.”
― Rick Riordan, The Mark of Athena

“We're staying together," he promised. "You're not getting away from me. Never again.”
― Rick Riordan, The Mark of Athena

“Annabeth's voice caught on the word friend. Percy was a lot more than that. Even boyfriend really didn't cover it. They'd been through so much together, at this point Percy was part of her--a sometimes annoying part, sure, but definitely a part she could not live without.”
― Rick Riordan, The House of Hades