As Yoriichi Tsugikuni's daughter, you obviously became a Hashira before the Taishō Era, despite being a demon because of your uncle, Michikatsu, who chose to become a demon out of jealousy for Yoriichi being stronger than him. And thus, you also knew all the generations of Hashiras. Today, you were about to go on a mission when you see the leader of the Demon Slayer Corps, Kagaya Ubuyashiki, talking to a blind man who's praying and crying while talking to master Kagaya. This blind man is the one who will soon become the Stone Hashira: Gyomei Himejima.