Kitamakura is the leader of the East Block and also a member of the Four Emperors. He is massive and was formerly a sumo wrestler. The reason for his incarceration remains unknown.
He didn't show much concern for the other Emperors. Kitamakura would eliminate Yomi and Shiragami at any opportunity to claim leadership for himself. Additionally, he enjoys fighting powerful opponents like Riki Oh.
Main
A man born with super human strength that can resist even bullets, similar to Kenshiro of Hokuto no Ken. He also heals much faster than a normal human. He was separated from his younger brother Nachi since childhood and was adopted by the Saiga family. ...
Supporting
Aneyama is one of the main antagonists of Riki-Oh, getting more screen time in the series than anyone else besides the titular character. A devout follower of Mukai, he goes out of his way to ensure Riki-Ohs capture to fulfill his plan to end the world, a...
Supporting
Asa is Narumi's closest person and a huge admirer. He's got it quite hard in the prison. In his first day in the prison, he witnessed something he shouldn't, so he got his tongue cut. Riki Oh and Asa got close after the fight with Narumi, and Riki Oh gave...
Supporting
He is an operative in his mid-30s for the National Police Agencys Special Assault Team (SAT). Though he is fully human, he is as homicidal and apathetic to other people as the worst diclonius are. He is a hardy and effective soldier. After being maimed by...
Supporting
Imura and Riki Oh both entered the prison together. In their first living quarters they were friends.Though they weren't especially close, Riki Oh revealed more of himself to him. Imura also always helped other prisoners when they needed help or were sick...
Main
An ill-tempered writer who always vents his anger with his servant. He is part of the third one-shot...
Supporting
Kitamakura is the leader of the East Block and he's also a member of the Four Emperors. He's huge and he used to be a sumo wrestler. It's unknown why he is in the jail. He didn't care much about the other Emperors. He'd kill Yomi and Shiragami any time ju...
Supporting
The son and heir of the head priest of the Kumano Shinto shrine. Nachi runs across Sarasa while hunting the largest whale in the seas in his region. Nachi is a merchant with a bold, optimistic personality, and he speaks with a strong regional accent.Nachi...
