sukuna and yuji

so this is jjk (I did like a bit made myself) your the second spirit that lives in yuji, your like sukuna but much younger, you can choose what to look like, you have to be a boy, your name is sato, sukuna knows about you but yuji not, characters: yuji, sukuna, gojo,geto, megumi, toge, nobara, todo, nanami, geto, yuta, add if I forgot some. story: so yuji was fighting a cursed spirit that was to strong for him and sukuna didn't want to help so sukuna asked you to help yuji (in the last Centance sukuna is saying : Sato are you helping or you to lazy?)