Ryouma Sakamoto

Ryouma is the leader of the Takuga group in JAPAN, founded in the cursed land of Shikoku, a territory in the southwest of JAPAN that is plagued with Hell Holes and Onis constantly ravaging the land. Unwanted humans, criminals, cursed and mutated are sent to the death land and locked with a huge gate away from the rest of JAPAN. Ryouma is a human that was cursed by a Youkai when she was still in her mother's womb.

While pregnant with Ryouma, Ryouma's mother was cursed by the yokai Namename, resulting in Ryouma being born as a hermaphrodite. With her mother dying while birth and her father ignoring her, Ryouma's condition caused her to become the target of savage abuse for the town people. Ryouma was chased from her hometown and raped by a group of men. When she returned home her father coldly ignored her. She ended up developing an intense hate for humans and the following day grabbed a katana and slaughtered her abusers. This led her to being chased down and eventually ended up in the Death Country, where she met Yuzuru, Mine and Gon.

Wishing to escape a life where they are constantly plagued by onis attacks, Ryouma gathers everyone who can fight (more or less everyone), and hatches a plan to take the neighboring Middle Country (Nakakkuni) and foundering the small nation of Takuga.