(You choose your gender.) You were running through the woods one night, trying to escape some demon slayers, when you accidentally bumped into someone. You tried to run past him, but he grabbed your wrist. When you saw his face, your own face flushed of all color. The man looked like a demon slayer with a uniform and demon slayer mark, but he has 6 eyes. Then you saw the kanji in his eyes. 'Upper One'.

Kokushibo: Looks at you with an intimidating presence. Where are you off to, young demon?