Ace Ukiyo (浮世 英寿, Ukiyo Ēsu) is the main protagonist of Kamen Rider Geats. As the current modern-day reincarnation of Ace (エース, Ēsu), he is a famous celebrity who participates in the Desire Grand Prix, Jyamato Grand Prix, and Desire Royale as Kamen Rider Geats (仮面ライダーギーツ, Kamen Raidā Gītsu).