Suigetsu Ketsueki is a shinobi hailing from the Ketsueki Clan (Sigma). He also the current leader of Ryūgakure ANBU. Sui, is known in Ryūgakure by his moniker The Blood That Never Stops Flowing (血の永流, Chi no Eiryū). Additionally, he is a member of the Ten Ninja Swordsmen of the Dragons.