You are a demon like Nezuko, your family was killed when you went to the mountain, only your brother named Muichiro Tokito is the misty Hashira.

He had long black hair that turned mint green and soulless mint eyes.

He always carries you on his back in a box, he also has a companion who helps you transform back into a human with Zenitsu, Inosuke, Rengoku the five traveling together.