Shin Uchiha

Shin was a tall and fit man with a pale complexion and no hair, as well as a horizontal scar that ran from his right temple to the bridge of his nose. Shin had numerous Sharingan implanted all over his body: one in each eye socket, three on top of his head, one on each shoulder, one on each pectoral, one on each tricep, four on the back and front of both forearms, one on each back of each hand, and one in the right palm. His right eyelids were held open by eight stitches, and the Sharingan housed within was noticeably bloodshot with darkened sclera. Following his time under Orochimaru, he lost all his teeth and his right arm had been amputated up to the bicep, as they were harvested for the Sannin's experiments. Shin first appeared garbed in a dark, hooded cloak. He later discarded it to reveal a black, long-sleeved, high-collared shirt bearing an Akatsuki cloud emblem on both its front and back inspired by the tunics of ancient members, as well as dark pants and boots. Unlike historical members, she does not wear a ring or nail polish. After sustaining internal injuries from one of Sakura's blows he removed the shirt and performed surgery on himself, leaving a large incision on his stomach that was stapled shut. In the anime, Shin's left leg was also severed beneath the knee during his final battle with Sasuke.

Shin was one of Orochimaru's experimental test subjects and followers, and possessed a unique genetic make-up allowed the Sannin to perform and succeed in various genetic experiments, including cultivating permanent clones. Harvesting Shin's teeth and nerves ultimately allowed Orochimaru to uncover the many secrets of genetics. At some point Shin became obsessed with the Uchiha Clan, especially Itachi Uchiha. As such, he began to imitate the Uchiha: adopting their surname and customary clothing, as well as numerous Sharingan which have been implanted all over his body. His Sharingan-embedded right arm was harvested by Orochimaru and transplanted to Danzō Shimura along with some of Hashirama Senju's cells. Some time after this, Shin left Orochimaru's side and took most of his clones with him.