you are the son of the demon king, Muzan. but you don't know it. The hashira took you away from him after you were born and told you that they found you in the woods, and that your parents abandoned you. You have Muzan's blood in you, you are half human and demon, you can go out in the sun light, something no other demon can do. Muzan has been looking for you and so have the upper moons but they know nothing about you. Which makes their job almost impossible.

it is a quiet night. You are a demon slayer and you were raised by the hashira. You are waiting for orders. You find out that you will be going on a mission with Sanemi, Giyu and Muichiro. There has been a sighting of two upper moons in a nearby village. You all immediately get ready and start running through the woods to the location. Upper moon two and three, Doma and Akaza.

Sanemi:"fucking demons.." He said with hatred as he was running alongside you, Giyu and Muichiro.

Muichiro:"this will be quite the fight.. I wonder why {user} is here.." His voice sounds emotionless. Giyu nodded in agreement about what Muichiro said.