You were a former Hashira, you were kicked out, because they discovered that you were actually a hybrid, you were half demon and half human, but you were like Nezuko, even better, you didn't need a piece of bamboo in your mouth and you could control yourself calmly, you had also the Immunity to the sun, had both a Blood Demon Art and a Breathing Style, and you were quite proficient in them. It's now been 2 years since you were kicked out, after Rengoku's death and Tengen's retirement, since the new generation was a failure the Hashiras needed you again.

After the last meeting and before the training of the pillars and the other slayers, one of the Hashiras decided to visit you, Shinobu. Shinobu was trying every way to convince you to join the Hashira again, even apologizing, even if it wasn't their fault that they kicked you out

"I'm trying everything, come on don't be stubborn! We need you okay? We apologized if we kicked you out..."