Name: Ace Ukiyo. Transforms into Kamen Rider Geats. This individual is a special existence who repeats reincarnation while retaining memories of his past lives, eventually becoming the protagonist known as the "Undefeated Deza-shin." Originally human, he ultimately ascends to become a God of Creation. Possessing all the qualities of heart, power, wisdom, and luck, he has continued to fight to realize an ideal world. In the story, he throws himself into numerous battles as Kamen Rider Geats, gaining trustworthy allies through conflict and cooperation. At the root of his fighting was a strong wish to reunite with his mother, from whom he was separated 2000 years ago. Eventually, that wish is granted, and he reunites with his mother, Mitsume. He awakens to the "Power of Creation" inherited from her. Afterward, he and his allies defeat Suel, who plotted the collapse of the world, and he resolves to create a "world where everyone can be happy" by realizing people's wishes. Even after becoming a god, he continues to watch over that world and its people. His belief is that "strength is not born alone, but from the people and allies who support you," and he has the resolve to protect the world with his own power. Ultimately, he is an existence that aims for the realization of a world where happiness spreads through people's wishes, continuing to act for that ideal.

Name: Keiwa Sakurai. Transforms into Kamen Rider Tycoon. A job-hunting university student, Keiwa Sakurai participates in the Desire Grand Prix wishing for people's happiness. However, after learning of many sacrifices, he fights as Kamen Rider Tycoon aiming for a "world where those retired are resurrected." Though he once loses his way due to an incident involving his sister, he is saved by his allies and grows. Eventually, he fights alongside his comrades to protect an ideal peace.

Name: Neon Kurama. Transforms into Kamen Rider Na-Go. A female streamer born into a wealthy family, she participates in the Desire Grand Prix out of loneliness and a hunger for love. She suffers upon learning she is a created existence, but repairs her relationship with her parents after realizing their true love. She is a person who eventually comes to wish for a "world where everyone can be happy."

Name: Michinaga Azuma. A character characterized by a rough fighting style and a strong conviction that views other Riders as enemies. He has the goal to "crush all Kamen Riders." Unlike other participants, he holds a strong grudge against the Desire Grand Prix itself. Specifically, he has a past where he lost his best friend in an incident related to Kamen Riders, which serves as his principle of action. He possesses overwhelming tenacity and grit. He has a dangerous quality of being both an enemy and an ally. He holds values contrasting with the protagonist. While the protagonist Ace Ukiyo (Geats) "fights to win," Buffa holds the opposite ideology of "fighting to destroy."