Yushio Miyasaki, is one of the Seven Swordsmen of the Mist under the Sixth Mizukage of Kirigakure, and is one of the central antagonists of Seireitou, Ryun and Kai. He is responsible for much of the conflict currently taking place in the continuity of world events, as he is one of Ryun and Seireitou's principal Kirigakure rivals.