Myou the Eternal Dragon a dragon that is summoned in order for Shadow Release: Purified Demonic Rasengan to be able to work. Myou is summoned on a weekly(or daily) basis by Teru she is different from Ryuuk in which she actually wants to help the summoner and he usually takes advantage of their weakness.Myou and Ryuuk battle lots of times and she has won 21 of them while Ryuuk has won 19 of them.She seems to know why Ryuuk is frightened by Takeo and their connection to the Infernal Sword.