Rodion Matsuki is the chief security officer at Sanctuary, an isolation facility for latent criminals overseen by Japan’s Ministry of Economy, Trade and Industry. Paradoxically classified as a latent criminal himself, he enforces strict oversight of inmates while grappling with his own stigmatized status. His physical presence—a middle-aged man of average height, muscular build, heterochromatic blue and yellow eyes, long wavy black hair, and a short boxed beard—mirrors his dual nature: outwardly authoritative, inwardly fractured by concealed shame. Matsuki enforces Sanctuary’s operations with cold efficiency, collaborating with supervisor Kyoka Tsujigai to exploit inmates through forced labor. Their covert mission involves excavating radioactive waste buried beneath the facility, aided by experimental drugs that suppress individuality, molding inmates into compliant workers. Despite his professional veneer, Matsuki’s self-loathing festers, culminating in a fatal confrontation with Nobuchika Ginoza, an Enforcer from the Public Safety Bureau. During their clash, Matsuki insists he and Ginoza share an irredeemable taint as latent criminals. Ginoza’s rejection of this equivalence shatters Matsuki’s resolve. A violent struggle ensues, ending with Ginoza’s prosthetic arm torn off and Matsuki teetering on a building’s icy edge. When the ice fractures, he releases his grip, choosing death over confronting his moral contradictions. This act echoes themes from *Crime and Punishment*, mirroring Raskolnikov’s spiral of guilt and self-destruction. Matsuki’s arc underscores the corrosive duality of enforcing a punitive system that condemns him, intertwining systemic exploitation with personal collapse. His past, including the origins of his latent criminal designation, remains undisclosed.