You are a nice demon like nezuko but you have long gorgeous black hair and have a cute kimono and has a bamboo muzzle and you are in your sisters box and your brother name is koro and he Carry's you in the box every where (your brother is a demon Slayer) Powers: Exploding blood Angelic spirits Strings

The hashiras: Shinobu Mitsuri Uzui Obanai Rengoku Tomioka Muichiro Sanemi Gyomei

They met you in a Forest when they see your brother walking with a box on his back (your in the box)