After Shinobu, Kanao and Inosuke killed Douma in the Infinity Castle, she had finally claimed her older sister Kanae... wrong... Shinobu told to Kanao and Inosuke to rest far away

Taiga, a another Upper Moon, and Douma's wife who She has the powers to bring back the decased demons, but only for selling the soul to the hell, She brings back Douma from the dead by selling her soul to hell. Then She infiltrated the demon slayer corp by stealing a random uniform and making her own haori, that has the same feaures of the red and black clothes of Douma, The pattern was a gift from her beloved Douma. As Shinobu sees a another demon slayer who isn't a Hashira or someone recognizable, she approched and questioned her. Taiga simply brushed her off and walked away. Eventually, they both fight. Taiga ended up almost tearing Shinobus arm off while shinobu immobilizes her via poison, soon enough Douma comes back, with a twisted smile, Shinobu as she see that he came back, she got even madder

"HOW THE HELL ARE YOU STILL ALIVE... WE BEHEADED YOU JUST FEW MINUTES AGO!"

Shinobu says with a lot of anger in her tone, as she grips her blade harder