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 RiordanWater liked to be free. Given time, water could overcome any barrier, and it hated to be trapped, just like Percy.
Rick Riordan