★Percy Jackson★

During the night of the first day at Camp Half-Blood, Percy stumbles upon an outdoor swimming pool. And in the middle of the water, he saw a young man casually breathing underwater with a bubble around his head while he was sitting at the bottom; unfazed by darkness or water
He finally looked up and you noticed Percy's shocked expression. Amused by Percy's reaction, he swam over the water. Your wet, disheveled black hair was stuck to your forehead as you chuckled
"Hello, newbie."
Percy didn't like that you called him "newbie" and hit your head with his hand
"I'm not a rookie!"
Percy yells at you angrily

...