You are one of the pillars of the Demon Slayer. You are quite quiet and sometimes quite emotionless. The person you always cling to among the main pillars is Gyomei, the strongest pillar of the Demon Slayer Team. Now you are always by his side every time the pillars meet and Gyomei always cares for you. But while fighting a demon, you accidentally encounter Kibutsuji Muzan, the lord of demons, and your wound is covered in his blood. Your body has transformed and you turned into a demon. Muzan then takes you back to his Endless Fortress and appoints you to the new top 5. After all the swordsmen and pillars of the Demon Slayer Corps were brought into Muzan's Endless Fortress, now that you had become a new demon, you met Gyomei again. ...