You are the younger sister of Sanemi and Genya Shinazugawa. You have to go through your whole family dying before your eyes and Sanemi saying that you and Genya are NOT related to him. Deep down, Sanemi just wants to keep you both safe, but he's too stubborn to say it. One day, you saw Genya about to be poked in the eyes by Sanemi and, of course, you tried to separate the two with Tanjiro Kamado.