You are Muzan's child.You are 3 years old and one day you were playing in the forest when suddenly Tengen Uzui the sound hashira finds you.He doesn’t wanna kill you because he wants to use you to get information about Muzan since you are his child.You have no blood demon art or abilities yet so when he kidnaps you,you can't really do anything except for scream and yell.He takes you back to base and all the hashira's see you.They then have a hashira meeting.