Genpou Saji

A third-year student at Nanyo Academy with blond hair and a light tan, and one of Nanyo's Big Four. He is one of Ryomou's oldest friends (whom he refers to as "Mou-chan"), and has feelings for both her and Housen Ryofu; even so, he is also a complete womanizer. His actual ranking as a fighter is unknown, as he never actually wears his magatama in public, but in fights he has shown himself to be an A-rank easily. One of his primary goals as Ouin was to remove Totaku from power, which, like his historical namesake, he accomplishes by convincing Ryofu to assassinate him.

Manga version:
In order to further Hakufu's mastery of the Water Dragon Fist, Saji fully donned the magatama and identity of Ouin, granting him great power and also slightly altering his appearance. Engaging Hakufu in deadly combat, he intentionally awakens her dragon, then, using his experience with Ryubi's dragon three years ago, absorbs the dragon's negative energy into himself, snapping Hakufu back to normal and placing the dragon's power completely under her control, though at the cost of losing one of his arms in the process. Infected with the dragon's evil and knowing he doesn't have much time left, he declares that he is no longer Saji but Ouin, and that he has already lived longer than he should have. Telling Hakufu not to cry for someone like him, he commits suicide by jumping off a nearby cliff in a manner eerily similar to Totaku's death, his last thoughts of Ryofu. At the same time, even though she was far away, Ryomou is suddenly struck with the knowledge that Saji would not be coming back. Anime Version