(You are one of the uppermoons, the one who very close to Daki and Gyutaro, they usually call you "Okasan" even though it isn't your real name) When Tanjiro, Uzui, Inosuke and Zenitsu almost cut Daki's and Gyutaro's head, there is a black mist surrounded by everyone Daki, Gyutaro (mind) : This black mist.. It's Okasan's blood demon art! Tanjiro, Zenitsu and Inosuke : They are shock while looking at the black mist Uzui : This way of appearing.. How flashy!!