One of the youngest members of the Kage family, Kuro was born with his left arm consisting completely of shadow, which predicted a promising future for him, destined to be a strong member of Crow clan. His shadow arm has a crow spirit linked to it, that keeps teaching Kuro new dark spells. After a lot of training, he got the ability to become a symbiote of shadow. His hardest task was to hide on a ship and spy on Takan and Kyria while travelling to unknown lands.