Pazu, an investigator in Public Security Section 9, leverages a shadowy past entrenched in organized crime—rumored to have cultivated ties with multiple yakuza factions before joining the unit. A streetwise tactician, he thrives as a versatile jack-of-all-trades, aiding field operations with sharp instincts and lethal folding-knife expertise. His brash persona—marked by chain-smoking and self-declared womanizing—collides with his profession when Kaori Kawashima, a former lover, undergoes surgery to mirror his appearance and infiltrate his identity. Their clash erupts into a knife duel with fatal consequences, leaving their survival ambiguously unresolved.

Resuming active duty, he navigates cyber-terrorism probes and volatile refugee crises, maintaining steadfast loyalty to the team despite employing ethically murky strategies. Later, during high-stakes operations targeting post-human adversaries and transnational conspiracies, he falls alongside comrades in a cataclysmic battle, concluding his tenure in Section 9.