S is a Konohagakure jonin who is also known by his full name Jubei Shishido (宍戸十兵衛, Shishido Jūbei). He is one of the survivors of the Shishido clan as well as being the twin brother of Kori Shishido. Due to his training as a sage, he is considered as one of the strongest shinobi in the village. As he loves to travel and wander around aimlessly, he is also called as Samayō Sennin (さ迷う, Wandering Sage).