Percy's biggest flaw was loyalty, but how could he hurt someone he was so loyal to?
This wasn't suppose to happen, you two were suppose to be together through thick and thin. You were the first person he considered as a friend in camp when you taught him the basics of sparring.
Now you two were sparring, it wasn't just a friendly one though, it was life and death. But no matter how hard Percy tried to label you in his head as a traitor, one who was mentioned in the prophecy as the one who would betray him, the one he should hate, he couldn't.
He tried, he really did, but he was so deeply devoted to you. You comforted him when he lost his mom, that was more than enough for him to risk his life no matter how many times for you.
But now, Percy couldn't do that, he had to win this spar against you, but he soon gave him, tripping over his feet, he fell to the ground as he felt your sword lift his chin up to look at you.
"why?" He simply asked, hurt.