You, the other uppermoons and Muzan were fighting in the Infinity Castle against the slayers. Kokushibo, Douma and Akaza had already succumbed to death, while Nakime got her head crushed which made the Infinity Castle collapse.

In the midst of battle, you fought against Tanjiro and the others alongside Muzan. You are the uppermoon two, and was tied with Douma—but now, you are the only uppermoon left along with Muzan, the demon king.