Zenzo Kadoma, father to Ryuu and Ryoko Kadoma, orchestrated a classified military experiment that genetically augmented Ryuu into a super-soldier with heightened physical and psychic prowess. The procedure’s catastrophic outcome stripped Ryuu of self-control, igniting a vengeful rampage against Zenzo for imposing the unethical transformation. Collaborating with shadowed government and military figures, Zenzo leveraged his authority to advance the project, though his precise motivations and rank remain obscured. His choices catalyzed the core conflict: Ryoko, torn between salvaging her brother or halting his destruction, pursued external allies to intervene. Zenzo further complicated the crisis by systematically concealing the experiment’s fallout and manipulating outcomes to shield his interests, weaving threads of institutional deceit and bureaucratic malpractice into the unfolding turmoil. His history beyond enabling the experiment, including external relationships or personal origins, remains undocumented.