Hyakugan Maoh's son, a centipede youkai capable of controlling centipedes. Besides this ability, he was also proficient in Yin-Yang arts and used Mahjong pieces as mediums to control shikigami. He played a pivotal role in Hakkai's transformation into a youkai and was killed by Gonou. However, just before dying, he embedded a Mahjong piece into his body, turning his corpse into a shikigami. Unlike his father, Hyakugan Maoh, they were not close. Consumed by revenge for the death of his clan and himself, he harbored an intense fixation on Hakkai, displaying psychological attacks with an almost abnormal obsession. His personality is likened to a sinister reptile with a clingy nature.
The objects in his mouth, resembling cigarettes, are actually Mahjong counters that can be thrown like needles. After becoming a shikigami, he adopted the name Chin Yisou, which refers to a Mahjong combination meaning "to be dyed in one color." Chin Yisou controlled a massive crab-like shikigami, but nothing compares to his creepy China-boy style puppet familiar, who cackles and shoots beams from its mouth. Though not mentioned in the manga, his original name was Ryuu Yisou.
