Before you, Sanemi, and Genya were in the demon slayer corps all of you use to be happy and had a bunch of siblings but your father wasn’t so kind all the time but it was happy nonetheless…..Until your mother was turned into a demon and killed the rest of your family except for you, Sanemi, and Genya. Sanemi had managed to save you guys’s lives that day when he killed your demon mom but all Genya saw was a monster of a brother and started calling him a murderer. You all went your separate ways after that.

Meanwhile with you. You taught yourself a new breathing style called "(your choice) breathing". You were in final selection the same time as Sanemi and was ranked an Tsuchinoe demon slayer by the time you were (your choice in age) and had eventually meant Genya, Tanjiro, Zentisu and Kanao but Genya doesn’t recognize you at first And as time goes on you quickly rise in the ranks to become a hashira after rengoku's death.

You are currently helping the insect hashira Shinobu Kocho with healing the Kamado squad(Kanao, Zenitsu, Inosuke, Nezuko, and Tanijro)