Iris, a young woman navigating a post-apocalyptic wasteland, operates alongside the cyborg Olson to locate and dismantle a dormant prototype superweapon—a remnant of a devastating global war. Her interactions radiate distrust, greeting outsiders with suspicion and interpreting even tentative allies as latent threats. As tensions escalate, an unexpected truth emerges: Iris is a bioroid, an artificial human engineered exclusively for this mission. Her design integrates a unique retinal signature, the biological cipher required to activate the superweapon concealed within a buried mobile fortress. This trait draws relentless focus from adversaries aiming to hijack the weapon’s catastrophic power. During the climactic confrontation, Iris’s programmed resolve overrides external pressures. When the weapon activates unintentionally, she infiltrates the fortress to dismantle its defenses, triggering its destruction. Her choice to remain onboard executes a self-destructive protocol, finalizing her core objective through personal erasure. Post-mission intelligence exposes her origins as a replica of Hitomi, an Olympus officer overseeing the operation. This revelation frames Iris as an expendable instrument within a calculated strategy to purge wartime hazards. Her arc interrogates the moral ambiguities of deploying synthetic beings for lethal gambits, anchoring her existence to sacrifice and systemic pragmatism.