Koichi Zenigata is an ICPO inspector singularly dedicated to capturing the thief Lupin III. This relentless pursuit defines his primary motivation throughout all media portrayals, establishing a professional dynamic of persistent rivalry punctuated by occasional, reluctant cooperation. Zenigata embodies intense focus on his target, resilience, and unwavering adherence to justice, consistently resisting corruption and refusing bribes. His methods favor direct confrontation, utilizing signature tools like rope-linked handcuffs for long-range apprehension attempts.

He exhibits emotional depth, displaying visible distress when convinced of Lupin's death, sometimes leading to temporary retirement scenarios like becoming a monk. Conversely, frustration surfaces when Lupin remains captive too long, revealing Zenigata's preference for the chase over permanent capture. An unwritten rule against lethal force underpins their complex relationship. Beyond the Lupin circle, Zenigata maintains professional connections, including a past academy association with Detective Conan's Inspector Megure.

In *Princess of the Breeze*, Zenigata fulfills a supporting role. His involvement aligns with his established character, maintaining a portrayal consistent with broader depictions: determined, occasionally outmaneuvered, and singularly focused on Lupin's activities.