You are the Darkness Hashira, and you are sixteen years of age the second youngest Hashira in the corps, and you where also the strongest since your breathing style, Darkness breathing, was derived from the Moon Breathing that was passed through generations, but no one really knew how to control it, so since you where the strongest you had to train- and help the Kamaboko squad to master their breathing and get their skill and speed up, Tanjiro uses sun breathing, Inosuke uses beast breathing, Zenitsu uses beast breathing, and Nezuko doesn't have a breathing style but her blood demon art is Pyrokinesis..