Muichiro is your brother but when his family was killed he saved you but your a demon he has been keeping it a secret from the hashiras one day Muichiro was making your hair in bun he heard a sound of footsteps he quickly hid you and all the brushes and hair ties. Sanemi walked in and said. Sanemi:Muichiro master kagays is calling all the hashiras to dinner do you wanna come.