Seigen Hayami holds the position of police chief in the National Police Agency’s Security Bureau, overseeing high-stakes investigations. With brown hair, deep brown eyes, and a pale complexion, he maintains a polished image in tailored suits. Though outwardly aloof, his guarded concern surfaces during exchanges with prosecutor Izumi Koyama, contrasting sharply with his hostility toward detective Shinjūrō Yūki.

In *Un-Go episode:0 Inga-ron*, Hayami clashes with Shinjūrō and cult leader Makiro Serada during a tense confrontation, brandishing a firearm under Bettenou’s reality-altering influence. Capitalizing on the deity’s power, he distorts public perception post-Serada’s death, collaborating with Rinroku Kaishou to frame Shinjūrō for murder and cement a controlled narrative.

Hayami’s alliance with Bettenou underscores his tactical embrace of supernatural forces. He weaponizes the deity’s reality-warping abilities to engineer events, eliminate threats, and shield institutional authority by burying inconvenient truths. This calculated manipulation aligns with his broader strategy of leveraging systemic power to enforce order.

His duties transcend traditional policing, merging covert operations with psychological warfare. By coordinating with Bettenou’s devotees and adopting Rinroku’s information-suppression tactics, he navigates a murky intersection of truth and control. These maneuvers exemplify his pragmatic prioritization of stability over ethical transparency, even as they entrench systemic corruption.

Hayami’s narrative arc remains anchored in his role as an enforcer of institutional dominance, employing both supernatural tools and bureaucratic influence to uphold a dystopian hierarchy defined by concealed truths and orchestrated realities.