Toru Muhyo, the youngest graduate from Magical Law School, established a supernatural investigation bureau alongside his assistant Jiro Kusano to address cases involving ghosts and spirits. His appearance is marked by a short stature, sleek black hair styled upward, and blue eyes. His signature outfit, sourced from children's sections due to his size, comprises a black cape over a white dress shirt, bright red shorts, red suspenders, knee socks, and loafers. Muhyo exhibits a detached and blunt personality, showing minimal emotion during exorcisms and often appearing aloof or rude. He sleeps frequently to conserve the spiritual energy necessary for summoning underworld envoys. Despite his stern exterior, he possesses a strong sense of justice and concealed compassion, particularly evident when protecting allies during crises. He avoids romantic entanglements and displays discomfort around revealing clothing. His background includes early struggles at Magical Law School, where he was initially an unremarkable student with friends Enchu and Yoichi. His latent talent awakened when he effortlessly subdued a spirit attacking Yoichi, surpassing Enchu. This event triggered Enchu's eventual descent into darkness after Muhyo earned the rank of executor first. Financial hardship characterized the bureau's early operations, with Muhyo and Roji often struggling due to low fees and irregular payments. Muhyo's abilities center on magical law execution, specializing in summoning powerful underworld entities to deliver judgments. He performs high-level sentences, including summoning Hades, single-handedly—a feat typically requiring multiple executors. He fluently speaks the underworld's language, enabling him to command or halt summoned creatures. Despite his spiritual prowess, he possesses limited physical stamina, excelling only in short bursts of speed or strength. Key relationships define his development: his partnership with Roji evolves from professional into deep mutual reliance, with Muhyo secretly valuing Roji's empathy and untapped potential. His childhood friendship with Enchu fractures due to envy and tragedy, culminating in conflict and Enchu's use of forbidden magic. Post-Enchu's redemption, Muhyo seeks his rehabilitation rather than punishment. He maintains a rivalry-turned-respect dynamic with Yoichi, another skilled executor. Across cases, Muhyo faces adversaries like the Goryo Group syndicate and the immortal Teeki. He confronts personal limits during battles, often suffering severe energy depletion requiring recovery. His development includes reconciling past traumas, accepting responsibility for Enchu's downfall, and demonstrating mercy to reformed foes like Goryo after near-fatal encounters. Trivia notes include his dislike of vegetables and dairy products, a love for meat-based dishes (especially Roji's hamburger stew), exceptional ping-pong skills, poor penmanship, and the natural formation of his hairstyle from sleep. He owns all series of the manga magazine Jabin and maintains a preference for low-profile operations despite his capabilities.