Kagen Uchiha

was a member of Konohagakure's Uchiha clan. He worked for the Konoha Military Police Force's logistical department, which meant he never had an opportunity to awaken the Sharingan. This, combined with the fact that Kagen was of unremarkable talent and had no close relatives, made him the perfect target for Root. Root killed Kagen and had the twins Gozu and Mezu - both surgically altered to look like him - split responsibilities of impersonating Kagen in order to spy on the Uchiha clan.