Atsushi Henmi forged a close bond with Kazuki Fuse during their Police Academy training, where both aspired to join the elite Kerberos unit. Henmi’s ambitions faltered under the unit’s brutal regimen, his resolve shaken by live-fire drills that left him physically debilitated and sleepless. Reassigned to the Public Security Division, he immersed himself in intelligence strategy, rising through ranks to orchestrate a clandestine operation: dismantling Kerberos by merging it with the Self-Police, prioritizing covert tactics over militarized force.

Leveraging his history with Fuse, Henmi manipulated his former comrade into crossing paths with Kei Amemiya, a fabricated sister to a deceased terrorist embedded by Public Security. The ploy aimed to entrap Fuse, discrediting Kerberos through staged incidents. Henmi pursued the pair into Tokyo’s sewers via a tracker planted on Kei, intent on silencing them to finalize his scheme.

Yet the confrontation unraveled as Fuse and the shadowy Jin-Roh unit countered the ambush. A firefight erupted, culminating in Henmi’s mortal wounding. Fuse, steeled by betrayal, executed a final strike. Henmi’s demise crystallized the clash between personal allegiance and systemic ambition—a zealot undone by miscalculating both his adversary’s resilience and the intricate countermeasures awaiting his conspiracy.