The way Percy's sarcasm evolves over the books is pretty telling. In 'The Lightning Thief', it's a defensive shield, a smart-mouth kid reacting to a world he doesn't understand. By the end of 'The Last Olympian', it's become a strategic tool, a way to defuse tension for his friends or throw enemies off-balance. That shift from reactive to proactive is the core of his growth, I think. He never loses that sharp edge, but he learns to wield it like he does Riptide.
Also, people talk a lot about his loyalty and fatal flaw, but I'm more struck by how his empathy functions. It's not just about protecting friends; it's about seeing the potential for good in former enemies. He understood Luke's pain and Clarisse's pride long before the prophecies spelled it out. That innate understanding of grey areas, in a world of black-and-white godly politics, is what makes him a leader rather than just a powerful demigod. The books make a point that his greatest strength isn't his swordplay or water powers, but his capacity to forge connections others miss.
I've seen reviews that call him a standard chosen one, but they're missing the quiet defiance in his character. He questions everything, even the gods he's supposedly destined to serve. That stubborn moral compass, more than any prophecy, defines his path.