Gyomei, when was teenager raised nine orphans in a temple. He worked hard, often starving himself, to feed them. One night, one of his orphan, Kaigaku, broke the rules, traveled beyond its borders and encountering a demon, and sacrificed the others to save himself. Later on, Gyomei became a Demon Slayer and after only two months, the Stone Hashira. He would go on to slay the demon who killed Kanae and Shinobu Kocho's parents. The sisters stayed with Gyomei for several days, where they met you. 