Shikkoku is an assassin belonging to the Kurohabaki Clan. He is one of the two Kai-Ken trios in Ginga Densetsu Weed: Orion. He is the brother of Gekka and Kurogane.
Shikkoku is a dark Kai-Ken, with slightly lighter urajiro-colouring. He has white markings over his eyes, which resemble eyebrows. He has dark markings around his muzzle, and dark stripes over his face and body. As his brothers, he also has light eyes with black cornea.