Kisaragi commands Daiwa Heavy Industries, the megacorporation that engineered Japan’s isolation and pioneered illicit cybernetic advancements. Driven by a fanatical conviction in humanity’s evolution through nanotechnology, he enacts catastrophic “progress” by forcibly converting populations into emotionless synthetic entities—a fate he meticulously avoids, clinging to his humanity to expose his hypocritical self-interest. His shadowed history with Maria, a key resistance figure, fuels their adversarial dynamic as he plots to escalate his experiments into global domination, deploying Daiwa’s robotic armies to subjugate nations.

A paradoxical blend of grand ambition and visceral cowardice, Kisaragi orchestrates widespread suffering from behind layers of security, shielding himself from the horrors he mandates. His regime unravels when Saito, a once-loyal subordinate, rebels against his leader’s refusal to endure the transformations he imposes. Surviving Saito’s assassination attempt, Kisaragi faces relentless pursuit by rebel operatives Vexille and Maria. In a final confrontation, Maria sacrifices herself to hurl him into the gaping maw of a Jag—a colossal mechanical sandworm—ending his reign but cementing Japan’s ecological and societal ruin.

Kisaragi’s legacy epitomizes the corrosive intersection of corporate tyranny and moral rot, his obsession with control and cold dismissal of empathy reducing Japan to a ravaged wasteland. A stark emblem of technological hubris, his downfall underscores the peril of evolution divorced from conscience.