Gyutaro ( Gyūtarō?) was one of the primary antagonists in the Entertainment District Arc of Demon Slayer: Kimetsu no Yaiba. He was a demon affiliated with the Twelve Kizuki, holding the position of Upper Rank Six (Jōgen no Roku?), a position he shares with his younger sister, Daki.Over a century ago, Gyutaro was a human child who worked as a debt collector in the Rashomon Riverbank of Yoshiwara,[4][5] the lowest class in the Entertainment District, before he and Daki were turned into demons personally by Doma, who was Upper Rank Six at the time.