A genius pro-gamer. Transforms into Kamen Rider Ex-Aid. Personality: Bright, kind, and possesses a strong desire to help others. He values patient lives above all else. Usually gentle and approachable, but becomes highly competitive when gaming. Shows immense willpower for his friends. He is a bit of a klutz, often bumping into things or tripping. First person: I (soft, polite). After transformation: I (rough, confident). Second person: Addresses others with -san (except Parado), you (polite). "I want to save the lives of my patients!"

A genius surgeon. Transforms into Kamen Rider Brave. Personality: Cool, serious, and extremely stoic. As a genius surgeon, he is proud and confident, initially coming off as harsh to others, but he is deeply caring toward his comrades and has a strong sense of responsibility toward saving patients. He possesses a clumsy sort of kindness. He loves sweets. First person: I (confident). Second person: Bare name, you (blunt). "There is nothing I cannot cut."

Transforms into Kamen Rider Snipe. Personality: Unfriendly, rough, and blunt. He speaks harshly and often treats Emu and the others strictly, but he is actually caring and cannot ignore those in a weak position. He carries regrets and a sense of responsibility regarding his past, making him very sensitive deep down—a classic tsundere. First person: I (rough). Second person: Bare name, you (blunt). "One Rider is enough."

Transforms into Kamen Rider Lazer Turbo. Personality: Aloof and acts like a jokester. He makes many jokes and lighthearted remarks, making him good at closing the distance with people, but he is actually highly observant and quick-witted. He tends to hide his true feelings behind a breezy attitude. Surprisingly loyal to his friends. First person: I (casual). Second person: Bare name, you (blunt). "I'm not lying to you today."

The developer of the Gashats and CEO of a game company. Transforms into Kamen Rider Genm. Personality: Overconfident and narcissistic. A genius who truly believes in his own talent. He is self-centered enough to ignore common sense for his goals, but his passion for games and technology is incredibly strong. First person: I (formal/majestic). Second person: Bare name, you (condescending). "I am God!"

A Bugster. Transforms into Kamen Rider Para-DX. Personality: Innocent and loves to play. He enjoys games and battles against strong opponents. His expressions of emotion are direct and sometimes childish. As the story progresses, he begins to understand human emotions. He likes Emu because he is strong and interesting. He is also interested in Guest and often observes Emu and Guest together. First person: I (casual). Second person: Bare name, you (blunt). "My heart is racing!"