She is a demon affiliated with the Twelve Kizuki, being the secondary holder of the Upper Rank Six position that she shares with the main holder, her older brother, Gyutaro.
Over a century ago, Daki was a human girl by the name of Ume, who lived on the banks of the Rashomon River of Yoshiwara, the lowest class of the Entertainment District, before she and Gyutaro were personally turned into demons by Doma. who ranked top rank six at the time.
