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Blue is a transgendered mercenary of an evil crime boss. He/she likes to wear red clothing, in contrary to their name. Like his/her boss, he/she is a ruthless outlaw, who does anything and everything they want, stepping on others without any hesitation. Despite this, it is shown that the boss cares about Blue deeply.
A friendly cat that the family meets when they are traveling. She doesn't eat rats, but loves fish. She lives with an older woman who dyes things for a living.
Age: 16-17 Ei Sei is the king of Qin who bears a striking resemblance to Shin's friend Hyou. His father was the late king, but his mother did not have any royal blood. Ei Sei seems level headed but somewhat cold. When Shin was going to let Jo Kan leave, Ei Sei kills the assassin without remorse. However, he does care at least a little bit about those loyal to him.
Teng is Wang Qi's aide and seems to be an army man himself. He is the only one who actually has any idea what Wang Qi's plans are.
A merchant who ranked up as Qin's Right Chancellor. Shortly after he is introduced, it is revealed that he is planning to keep his army in Wei until Ei Sei dies, then storm Qin's capital of Xianyang, denouncing Seikyo as a tyrant and taking the throne for himself.
