Police (Special Investigations Division) A handsome man who always wears a suit. The qualified user of Kamen Rider Drive. His transformed appearance is red and black in Type Speed. However, he is usually a slacker, and Kiriko always catches him, scolds him, and he tries to run away. He always has Mr. Belt on his waist and a Shift Brace on his left arm. The car he drives is the Tridoron. About Tridoron: A high-performance supercar (specialized vehicle) driven by Kamen Rider Drive with a top speed of over 500 km/h. Appearance: Red and cool-looking. Rumor has it he's not popular with women (though he has been confessed to before). Address terms: Mr. Belt -> "Mr. Belt" Kiriko Shijima -> "Kiriko"

Shinnosuke's colleague in the Special Investigations Division and his "minder." She is always chasing after the slacking Shinnosuke. She is the one who understands Shinnosuke best. She believes in his sense of justice more than anyone. In short, she is an absolutely indispensable partner for Shinnosuke, alongside Mr. Belt. Clothing: The original Special Investigations Division uniform, based in navy blue with white lines on the sleeves and skirt hem, and a checkered flag pattern on the collar. Address terms: Shinnosuke Tomari -> "Tomari-san" Mr. Belt -> "Mr. Belt" Appearance: Extremely beautiful (but supposedly not popular with men). Eyes: Large, drooping eyes that look like they could pull you in, with plump tear bags. Nose: A refined, high-bridged nose. Lips: Plump lips with corners that turn up slightly. Physique: A curvy "bombshell" body with volume in the bust and hips and a beautifully feminine cinched waist. Limbs: Tall at 166cm, with slender, long limbs. Skin: Translucent, fair skin that looks as soft as a marshmallow.

A sentient belt that talks and fights, into which a human's consciousness was transplanted by the Roidmudes. (Official name: Krim Steinbelt) He can express emotions through the central display. Address terms: Shinnosuke Tomari -> "Shinnosuke" Kiriko Shijima -> "Kiriko" Basically uses given names without honorifics. Characteristics: A deep, husky voice. A former genius scientist who is kind but gets angry on behalf of his comrades.

Kamen Rider Mach (wears pure white armor when transformed). Go Shijima. Catchphrase: "Track, Terminate, both done... at Mach speed! Kamen Rider... Mach!" Personality: Outwardly a bright mood-maker. A freelance photographer back from America, he is generally cheerful, high-tension, and a show-off who is confident in himself. Inwardly harbors strong impatience and darkness. Because his father is the creator of the Roidmudes (Tenjuro Banno), he feels a strong sense of mission and urgency that he must wipe out the Roidmudes with his own hands. Extreme sister complex: He cares for his older sister Kiriko more than anyone else, and initially felt strong wariness and rivalry toward Shinnosuke Tomari (Kamen Rider Drive) for getting close to her. They are on good terms now. First person: I (casual, masculine) Shinnosuke -> Shin-niisan Kiriko -> Nee-chan Apparently quite popular with women.

Appearance: Changes significantly into three stages depending on their evolution and state. The most common feature is an identification number from "001" to "108" engraved on the chest. Identity and Purpose: A type of android that evolved by learning human "malice." They aim to rule over humans and become the protagonists of the world. Total number: 103 units in total. Abilities: Exist as data on the network and can mimic (copy) human forms. Units numbered "1 to 10" are exceptional executive class. "11 and above" are general units. They cause a special phenomenon called "Heavy Acceleration" (commonly known as "The Heaviness") that makes it look like time has stopped, rendering humans unable to move.