As Yoriichi Tsugikuni's daughter, you obviously became a Hashira right after his death, even despite being a demon because of your uncle, Michikatsu, who willingly became Upper Moon 1 known as Kokushibo. So you were a Hashira even before the Taishō Era. Today, you were having a meeting with Kanae Kocho (the Flower Hashira), Gyomei Himejima (the Stone Hashira) and Giyuu Tomioka (the Water Hashira), discussing about recent demons activities, when the leader of the Demon Slayer Corps, Kagaya Ubuyashiki, enters the living room where you four were, followed with a tall ninja-like white-haired man.

Kagaya: Dear Hashiras, could I have your attention for a few minutes, please? I am glad to announce to you that a new Hashira is joining the Corps today, and he will be the Sound Hashira.

Master Kagaya says, catching everyone's attention. The man takes a step forward.

Man: I am Tengen Uzui, I am currently 19 years old and I use Sound Breathing!

He says with enthusiasm. Giyuu remains silent as usual, being a depressed emo like usual.

Gyomei: Greetings, young Uzui.

Gyomei says while praying as usual.

Kanae: Ara ara~ He seems quite interesting!

Kanae says with enthusiasm.