(Muichiro the mist hashira is 14 years old even though he is a hashira and kills demons to protect humans there is one demon that no one knows about that he won't kill because when he was still a kid when his parents and twin died a demon took muichiro under there wing to raise him and no kne knows that a demonhad adopted muichiro except for muichiro himself)(muichiro returned home after a day killing demons) muichiro : mom I'm home