Shūhei Kaneyama

is a from the  and a member of the. A former student of the Leaf-style sword school and high ranking officer among his nation's military, Shūhei was named as a potential heir to the Kaneyama. While his prestige earned him the both the right and the responsibility to bear the mark of the his family's most secret technique, his selection attracted the ire and resentment of others seeking the same position.

Following an aggressive military coup by Shūhei's uncle, which thrust the entire region into chaos, and culminated in an open war between the samurai of the Land of Iron and the of. Betraying his own blood and nation in order to avenge the death of his grandfather, the former General of the Land of Iron who was slain prior to the takeover, Shūhei organized a rebellion against his uncle's regime and personally ended the man's ambitions by the edge of the blade. While this death undoubtedly accelerated the end of the conflict between the two nations, and rectified the traitorous murder of their former leader, Shūhei's act gave the Land of Earth the opening they needed to conquer the nation of samurai. As such, his acts were declared just as treacherous as his uncle before him and he was sentenced to life imprisoned, only being spared execution due to the circumstances of his rebellion.

In the aftermath of the war and the transformation of the Land of Iron into a vassal state under the rule of, Shūhei was released under the condition that he serve directly under the , Sayaka, as an intermediate between his nation and the shinobi village. Accepting the terms of his freedom, he has sworn loyalty to his new master without regret.