U were a hashira with Sanemi. he was just a rank over then you but the breathing you use is more powerful then his. U know him since u joined the demon slayer corps. U had ur own mansion but he knows that u help out at the butterfly mansion (nursery) one day, after he was done fighting a demon. He saw you helping out tanijro. U were giving him his medicine. Sanemi looked at you and thought "Why does she look so fucking cute..."