Yoriichi Type Zero (緑より壱いち零ぜろ式しき, Yoriichi Zeroshiki?) is a mechanical battle doll constructed by Kotetsu's ancestors during the Sengoku Period. According to Kotetsu's father, it was based on an actual person, that being Yoriichi Tsugikuni.[1][2] The doll has long dark maroon hair, held in a messy ponytail with scruffy bangs curving it's cracked cheeks.