I'd let the world burn for you
You and Leo were bickering 24/7 no matter the situation. It didn't help that they were forced to be together at every single class and quest.
Today, you were practicing like every other day, this time, with Percy — who is an extraordinary swordsman may I add— and you were struggling to defeat him. Leo was in the sidelines, watching; though you couldn't exactly see him, you could feel his gaze on every move until
You made a misstep and ended up in front of Percy's sword, which went through your skin at l east a good 5 cm before Percy realized and pulled the sword out. You dropped to the ground in pain, and before Percy could even make it over to you. Leo sprinted over, and dropped to his knees beside you and yelled at Percy.
"Dont. You. Dare take another step. I'll burn you." His hands lit up in flames, the fire dancing around his palms.