Within the London storyline involving Sherlock Holmes, Zenigata coordinates with local law enforcement, including Scotland Yard's Inspector Lestrade, to capture Lupin. At a crime scene, subtle hesitations and glances betray his suspicion regarding Lestrade's actions or motives. Though authorized to pursue Lupin in London, jurisdictional boundaries restrict his operational scope without local cooperation. His investigation briefly intersects with the Raven, a secret organization manipulating the British government, though his direct involvement remains secondary to the Lupin chase.

Zenigata later travels to the Republic of Cotornica, where he is falsely accused of murdering a representative and imprisoned. This forces his subordinates, Goro Yatagarasu and Arianna, to independently investigate to clear his name. During their efforts, Arianna reveals her connection to Tomoe—a woman linked to Lupin’s past and mentor to characters like Mercedes and Hazel—though Zenigata's own direct knowledge or relationship to Tomoe is not explored. Imprisoned, Zenigata plays a passive role while Yatagarasu and Arianna uncover evidence implicating Mattea, a florist acquainted with Lupin, as Hazel's actual murderer.

Zenigata's interactions consistently underscore his persistent obsession with capturing Lupin, a franchise hallmark. His partnership with junior officer Yatagarasu continues, demonstrating a professional dynamic where Zenigata leads investigations despite setbacks like imprisonment. His competence surfaces through moments of intuition, such as detecting potential corruption in Lestrade early on. While physical skills like judo and marksmanship are not prominently featured this season, his role remains action-oriented during pursuits.