Shikashide Nara

is the first artificial human created by Muramasa Mochizuki, as well as the only Human-Base Model artificial human in existence. He was formerly a Konohagakure shinobi, but defected to side with Muramasa in his Vincero organization.

Background
Shikashide is implied to have met Muramasa sometime before the Land of Mountains Civil War and defected from Konoha to side with Muramasa in the war against Ryun Uchiha. He later became the first one Muramasa experimented on to create the artificial humans for Vincero. During the experimentation, Muramasa harvested Shikashide's DNA for use in future experiments. Using the data he gained from observing the, Muramasa was able to give Shikashide intelligence data on several high-ranking shinobi, including their special techniques. In addition, Shikashide received the cultivated cells of members of the Yamanaka Clan and the Akimichi Clan, allowing him to become the.