Kasukabe, alias Haze, is a 64-year-old scientist whose youthful visage masks decades of life, preserved by a magic experiment that halted aging. His sharp features include short black hair, dark skin, and thick eyebrows, while tattoos sprawl across his body in tribal patterns and arcane sigils. He dresses in a stained lab coat draped over casual attire, emblematic of his relentless hands-on methodology. His defining obsession—studying magic-users—stems not from compassion but insatiable scientific curiosity. This fixation ignited after rescuing and marrying Haru, a stranded magic-user in Hole. Adopting her surname, he dedicated his life to unraveling magic-user biology, operating a clandestine clinic for decades. There, he dissected salvaged corpses and conducted invasive procedures to reverse magical mutations, often leaving subjects dead on his operating table. Notable milestones include mentoring protégé Vaux and partnering with Ai Coleman, a human desperate to wield magic. Kasukabe grafted magic-user tissue into Ai during a perilous surgery, briefly sustaining her before her demise—a failure that shuttered his clinic. A decade later, he rebuilt the self-mutilated sorcerer Shin’s arms, unlocking destructive powers that collapsed Hole’s militia and escalated human subjugation. In later years, he engineers innovations like sorcerer-flesh magic doors and joins a hospital baseball team, displaying unexpected whimsy. He domesticates Jonson, a magic-polluted giant cockroach, steering him via frequency emitters. Captured by sorcerer lord En, he documents his torture with clinical detachment before escaping alongside Jonson and the enigmatic 13, deploying strategic threats to outmaneuver pursuers. Though separated from Haru for 25 years, their bond persists through morbid fascination—he covets dissecting her devil form; she indulges his visits. Reuniting in her Hydra Forest lair, surrounded by grotesque magic-born hybrids, they navigate mutual danger. Kasukabe treads a razor’s edge between detached inquiry and covert loyalty, advancing research while inadvertently aiding allies. Once an isolated scholar, he now shapes conflicts between Hole and sorcerers, reviving corpses as puppeteered weapons and sabotaging En’s regime. He publicly dismisses sentimental motives yet shields allies like Nikaido, safeguarding her autonomy while neutralizing threats to her power. His actions whisper care beneath a creed of cold empiricism.