Kotoshiro (コトシロ, Kotoshiro) is a wandering fisherman who is in-fact a Missing-nin from Tanigakure. Kotoshiro was expunged from the small village primarily due to his Uchiha heritage being awoken in the form of his Sharingan. The event caused fear to sprout within the individuals of the village, who believed that he would incur a similar descent to darkness that his predecessors had. In his fear, Kotoshiro mortally wounded his former teacher, causing the fearful villagers to name him the . At some point during his continuous escape from the Land of Rivers' forces, Kotoshiro joined the Nanabake, granting him political immunity from his previous village in exchanging for submitting his loyalty to a single leader and his cause.