Inspector Koichi Zenigata, a high-ranking ICPO officer, relentlessly pursues master thief Lupin III, driven by a conviction that only he can deliver justice to his rival. Originally from the Tokyo Metropolitan Police Department, where he targeted Fujiko Mine, he transitioned to Interpol to focus entirely on Lupin, forging a rivalry marked by mutual respect. Zenigata balances determination, impulsiveness, and a staunch moral code. Despite occasional perceptions of him as overly single-minded, he showcases exceptional investigative acumen, physical endurance, and martial arts expertise in judo and karate. His signature tools include handcuffs tethered to a rope for long-range arrests and a Colt M1911 pistol. While primarily Lupin’s adversary, Zenigata adapts to collaborate with him against larger threats like political schemes or organized crime. In crossovers such as *Lupin III vs. Detective Conan: The Movie*, he partners with allies like Juzo Megure—a former police academy peer—to foil heists like the Cherry Sapphire theft. His resilience emerges in moments like rapidly recovering from a stun gun shock, impressing even Conan Edogawa. Vulnerabilities punctuate his arc, including temporary retirement or grief when presuming Lupin deceased, revealing how his identity hinges on their chase. Though frequent clashes with superiors over tactics or resources occur, his success in capturing secondary criminals secures his Interpol position. Personal life remains sparse, with brief allusions to family, overshadowed by his all-consuming mission. Adaptations fluctuate between stern, tactical depictions and boisterous humor, yet core traits endure: tenacity, combat skill, and an unspoken bond with Lupin that complicates their rivalry. This dynamic cements Zenigata as a figure defined equally by his physical pursuits and the psychological interplay with his elusive counterpart.