Professor Souichi Tomoe, a disgraced geneticist and astrophysicist exiled for unethical gene manipulation and cybernetic research, leveraged sold research data to seize Tokyo’s Sankakusu District. There, he erected Mugen Academy—a facade for a hidden lab where he engineered “super life forms” by merging humans with alien DNA. His experiments drew Pharaoh 90, an interdimensional cosmic entity, who bargained power for allegiance. Tomoe consumed a Daimon egg, fusing with the parasitic Germatoid to gain enhanced abilities and a splintered psyche interweaving human intellect with alien will. His past unraveled in tragedy when a lightning-sparked fire obliterated his lab, claiming his wife Keiko and mortally wounding his daughter Hotaru. Desperate, he rebuilt her with cybernetics and implanted a Daimon egg, unwittingly tethering her soul to Mistress 9, Pharaoh 90’s counterpart. This act bound him irrevocably to the entity, spurring him to form the Death Busters—a cult harvesting human souls to stabilize Pharaoh 90’s decaying dimension. Under Germatoid’s sway, Tomoe engineered the Witches 5, hybrid warriors, and industrialized Daimon egg production through biomechanical synthesis. Though consumed by his crusade to forge superior beings, Tomoe harbored conflicted paternal instincts. He oscillated between indulging Hotaru’s needs and prioritizing his cosmic ambitions. During a climactic battle with the Sailor Guardians, Germatoid’s influence fully consumed him, mutating his body into a monstrous form. Sailor Moon’s Rainbow Moon Heartache attack shattered the symbiosis, severing Germatoid’s hold. As he perished, Hotaru mourned the father lost long before his physical demise. Alternate timelines fracture his fate. The 1990s anime portrays him surviving Germatoid’s destruction with amnesia, tending to a reincarnated infant Hotaru until Sailor Pluto intervenes. Later, he retreats to a quiet life, though shadows of his ruthless past linger. Stage adaptations reimagine his story through possession by other entities and homunculus experiments, amplifying his duality as a scientist torn between ambition and warped familial devotion. Tomoe’s legacy epitomizes the ruin of a visionary intellect. Once driven by altruistic aims—human advancement and healing his daughter—his pact with extraterrestrial forces perverted these goals into a megalomaniacal crusade. Merged with Germatoid, he became a paradox: a being torn between residual human empathy and an alien nihilism, his Mugen Academy experiments serving as grim testament to the dangers of unchecked scientific ambition and humanity’s perilous reach beyond its limits.