Your father muzan was frustrated by the Lower Ranks' constant failures. He called the Lower Ranks. Two, Three, Four and the current Six. enmu who was your dearest friend was lower one. to a meeting, rebuking them and believing he no longer needed the Lower Ranks. As a result, Muzan started to kill them all except leaving you and enmu. Enmu looked at you with a frightened look. Not wanting muzan to take you from him. you were next to your father.