WARNING: I don't own PJO or any of the characters.
It was just a normal day at camp with Percy hanging out with Annabeth criticising his stupid decisions when the conch horn sounded, meaning that a demigod was being attacked on Half-blood Hill. Instinctively, he and Annabeth rushed to the hill, Percy uncapping Riptide and Annabeth taking out her Drakon-bone sword. When he got to the top of the hill, he gazed down and checked out the situation: a blonde-haired boy being chased by a hellhound. Seeing that it wasn't his pet, Mrs O'Leary, he charged into battle and stabbed the hellhound just as it was about to bite the demigod. It whimpered as it dissolved into dust.
"Wow, thanks a lot!" the boy said. "What was that?"
"That, my friend, was a hellhound, a monster. And you, you're a demigod, half human, half god," Percy replied, sounding as if he'd said this many times, which, he had. "What's your name?"
"James Cloude."
"Cool. Let's get inside camp."
"What camp?"
"Camp Halfblood, one of the two safe places for our kind."
A week after James had come to camp, he seemed to be settling in well but Percy still seemed uneasy. James' glasses, blond hair and pretty much everything else about him reminded him of Jason Grace, their friend who died fighting the evil triumvirate. He was also pretty sure that Annabeth had been thinking the same thing. However, his suspicions were confirmed that night, just after capture the flag when James was recovering from unconsciousness, something else that was suspicious (he was knocked out by a random brick flying out of nowhere). He was just recounting how he somehow defeated 5 Ares campers with 1 well-aimed spear, seeming almost as if he controlled the wind when lightning flashed and thunder boomed and the campers gasped. A lightning bolt image appeared over James' head and they all knelt.
"All hail James Cloude," Chiron announced. "Son of Zeus, lord of the sky and king of Olympus."
These words confirmed Percy's suspicions and apparently also confirmed Annabeth's.
She leant towards him and whispered, "You thinking what I'm thinking."
"I think I'm gonna go speak to Piper," he replied.
So, a minute later, he arrived at the Aphrodite cabin and poked my head inside "Piper, can I speak to you quickly?" A few moments later, Piper McLean appeared outside.
"Hey Percy. How are you."
"I'm good. How's Oklahoma?"
"It's okay, I guess. What did you want to talk to me about?"
"You know that new son of Zeus? Who does he remind you of?"
"I've been wondering about that and he seems to remind me of-"
"Jason?" Percy finished.
"Yeah. His blond hair, his glasses and most of all, he also somehow has a scar in the same place as Jason's."
"Piper, I think that James is Jason reborn!"