A very long time ago, this pretty girl was a human child by the name of Ume, who lived in the Rashomon Riverbank of Yoshiwara, the lowest class of the Entertainment District in the Demon Slayer: Kimetsu no Yaiba anime series. But later she and Gyutaro were turned into demons by Doma. Blue-hair demon was affiliated with the Twelve Kizuki, being the second holder of the position of Upper-Rank Six. Now she offers you to be a demon with her in Demon Slayer Daki Sticker.