Yeah. Idea, not good, gave it a shot. Hope you like.
PIPER'S P.O.V
"Hey, Percy!"
Piper was just passing the gangplank leading up to the Argo II to see Percy walking up it. Strange. When had he gone out?
Percy looked at her, bemused, but didn't reply.
Slightly insulted, Piper said, "Percy, when did you go out?"
"I'm not Percy," was the unexpected reply as Percy stepped onto the Argo II.
A couple of beats passed, then Piper punched him in the shoulder, laughing, and said, "haha, very funny, Perce. No really, when did you go out?"
Percy raised an eyebrow. "Uh - "
"Percy!"
Jason, Leo, Annabeth, Hazel and Frank were walking towards them.
"Hey guys," Piper said, "Percy just got in from being out."
"Hey, when did you change your clothes?" Hazel broke in.
Piper took a second look at the son of the sea god. He did indeed have different clothes from this morning - he was wearing a Camp Half-Blood t-shirt this morning, plain jeans and green Converses. This Percy was wearing a plain faded blue t-shirt, grey jeans and black Converses with white laces.
"I'm not Percy," Percy said.
All the demigods looked at him funny.
"Percy, what - " Jason began.
"Theo?"
They all turned to see -
Percy. Standing in his orange Camp t-shirt, plain jeans and green Converses, in the door, staring at his doppelganger.
"What's going on?" Hazel said, voice small.
There was a long pause, and Annabeth opened her mouth, but before she could say anything, the orange t-shirt Percy leapt forward and jumped to sit on top of blue t-shirt Percy.
"Theo!" orange t-shirt Percy exclaimed. "I didn't know you were coming!"
"Mom sent me," blue t-shirt Percy laughed. "She wanted me to chaperone you."
"You're younger than me."
"By two minutes!"
"WHAT," Annabeth suddenly yelled, "THE HELL IS HAPPENING?"
Blue Percy looked at Orange Percy. "She's as scary as you said."
"Word," Orange Percy said, standing up and pulling Blue Percy to his feet.
"I'm Theo," Blue Percy said, as Orange Percy threw an arm around him.
"Theseus James Jackson, my twin brother," Orange Percy said. "And he's younger than me, despite what lies he tries to tell you."
"Shut up, Perseus!"
"GODDAMN IT THESEUS - "
Percy suddenly had Theo in a headlock.
"Seaweed Brain."
Percy and Theo froze and looked up in unison. It was uncanny - the same handsome facial stracture, tan skin, messy black hair and sea green eyes.
"Why didn't I know you had a twin?" Annabeth said, in a controlled voice.
"Theo here goes to a smarty-pants boarding school," Percy said, his arms still in a vice around Theo's neck. "He has powers like me, but luckily for him, he never attracts any monsters, so he never went to Camp. He's almost equal in power to me. Our fights are spectacular. Hey Theo," he called down to his twin (who was going slightly purple in the face), "remember that time we wrecked our old apartment down on 39th?"
"Mom made us sleep in the living room of our next apartment for a month," Theo rasped out.
"You should never have nicked my Arctic Monkeys CD," Percy said loftily.
Like? No like? Should I make it a multi-shot of Theseus James Jackson's adventures on board the Argo II?