Kamen Rider Ziin is a mysterious supporter and ally in the series 'Kamen Rider Geats,' part of the Kamen Rider franchise. Ziin is known for his calm demeanor, intelligence, and deep fascination with the main protagonist, Ace Ukiyo. As a supporter, Ziin provides resources and guidance, often influencing the progression of the Desire Grand Prix. His enigmatic motives and advanced technology make him a pivotal character, shaping the fate of other Riders throughout the series.