TV-Series
Description
Kaitō U serves as the detective protagonist's rival, orchestrating heists and elaborate schemes focused on valuable artifacts. The character consistently announces thefts in advance and executes them with theatrical flair, typically returning stolen items after achieving objectives, driven by motivations centered on retrieving specific items of significance rather than personal gain.

In "Farewell My Beloved Partner," Kaitō U becomes involved in a complex art forgery investigation at Hattan Town's Metropolitan Museum of Art. The character uncovers a conspiracy by a secret society coercing Dr. Kinmoku into producing counterfeit paintings. Despite sustaining a significant injury during a confrontation with this organization, Kaitō U persists alongside the detective in pursuing the truth, leading to a critical decision between loyalty to a partner and exposing the conspiracy.

The subsequent film "Star and Moon" depicts Kaitō U targeting Kaitou Academy, an international crime organization disguised as an idol contest on Stardus Island. Infiltrating the academy's underground headquarters, the character seeks to retrieve the Moonlight Stone from its leader, Kaito G. This mission coincides with an investigation into the academy's "DARK AGE Project," prompting an unprecedented temporary alliance with the detective to thwart the organization's plans. Their cooperation proves essential to uncovering the secrets of the Moonlight Stone and Kaito G's objectives, while also revealing the forgotten past of another key character, Brown.

Kaitō U's background and true identity remain deliberately mysterious across appearances. While consistently presented as a skilled strategist capable of intricate heists, specific personal history or origins remain unelaborated. The character's development focuses on shifting dynamics with the detective, evolving from adversarial interactions toward reluctant cooperation against larger threats, particularly evident in "Star and Moon" where shared objectives against Kaitou Academy necessitate joint efforts despite their rivalry.