Ginnai Doma is a fallen samurai resurrected via extraterrestrial science far surpassing the technology of his time. After being slaughtered with his family by ninja clans, his corpse was rebuilt into a cybernetic body by unknown alien forces, endowing him with immortality, accelerated regeneration, and augmented physical power. His imposing frame merges archaic warrior aesthetics with mechanized components—limbs reattach seamlessly via a glowing white adhesive, and he wields a traditional katana juxtaposed against his futuristic enhancements. Consumed by vengeance against the ninja who destroyed his lineage, he enforces the will of a warlord employing technologies out of sync with their era: firearms, energy blades, and plasma weaponry. His campaigns against ninja clans are marked by visceral brutality—shattering bones, severing limbs, and persisting through beheadings or incendiary blasts. Though mechanized, his human memories and grief anchor him to a nihilistic existence, viewing his eternal life as a curse rather than a gift. He repeatedly clashes with a young ninja avenging allies slain by his hand. These confrontations reveal his strategic cunning, such as countering hallucinogenic diversions with adaptive tactics. His resilience is proven through survival of poison-induced paralysis, repeated impalements, and full-body immolation. A hydrogen fuel core sustains his form; its rupture risks annihilation via nuclear blast. Later skirmishes unveil deeper cybernetic horrors—his severed head operates independently, projecting lasers while airborne. His demise arrives when bisected by a blade strike igniting the fuel cell’s detonation. Yet cryptic allusions to alien observers and an unidentified spacecraft imply his resurrection may not be final, leaving his ultimate fate entwined with forces beyond mortal comprehension. Consistently portrayed as an unyielding engine of retribution, his persona remains static across narratives. Flashbacks and combat sequences dissect his tragic past and hybridized physiology, framing him as an enduring emblem of wrath fused with alien technology and unrelenting ruin.