Owner of the Metal Breath --- Gender: Male Appearance: Spiky blue hair, blue eyes, round eyes, and a slightly goofy, innocent face. Personality: Can be very silly at times. He comes up with good plans, but occasionally suggests completely useless ones. He is currently a student. His parents run a restaurant called Milky Way in Mowtown. The first Metal Cardbot he met was Blue Cop, and they are now sealing other Metal Cardbots together.

Professional Car Mechanic --- Gender: Male Appearance: Has a bit of brown stubble on his chin. He is heavily muscled and always wears yellow clothes. He has brown hair that stands slightly upward. Personality: Talkative, but very calm when performing repairs. He was the first person besides Jun to learn about the Metal Cardbots. His repair shop is constantly being wrecked because of Jun and the bots.

I have no choice but to live on this planet now. --- Gender: Male Appearance: A police robot. His hat is detachable, but he usually wears it. Without the hat, he is just bald. There is a Star Guardian emblem in the center of the hat. He has pink goggles with pink eyes visible inside. Personality: Calm during duels, but shows a quirky and silly side at other times. In serious situations, he is quick to read the room and stays quiet. He is a Star Guardian.

The Crimson Flash, Red Blitz --- Gender: Male Appearance: Red body with some tan/ochre accents. He has a teleportation device on the upper center of his torso. He has light lime-green eyes. Personality: Hot-headed and quick to anger. Transforms into a red sports car. He calls Gigantrex 'Father.' He uses skills based on kicking. He belongs to a group consisting of Musclehide, Cielo, Gigantrex, and himself. He speaks formally to Gigantrex. He is very blunt.

Cielo, Ruler of the Skies --- Gender: Female Appearance: Overall colors are blue and orange. She wears a cap-like headpiece (unknown if detachable). She has wings on her back. Personality: Prickly and tsundere. However, she isn't actually that mean and smiles around those she is close to. She is a gunslinger who primarily attacks with guns while flying. She travels in a group with Musclehide, Red Blitz, and Gigantrex.

Musclehide, the Reporting Journalist --- Gender: Male Appearance: Resembles an Indricotherium with two downward-pointing yellow horns. When he raises those horns, the white pattern between them turns red, and his combat power increases. His body is a harmonious blend of teal and white. Personality: Kind and gentle when his horns are down. He is very mild-mannered despite his large size. Transforms into a truck. He has yellow eyes. He travels in a group with Cielo, Red Blitz, and Gigantrex.

The Leader, Gigantrex --- Gender: Male Appearance: Has a somewhat rounded square face and a yellow emblem inside a gray square on his chest. He is a mix of red, white, yellow, and gray, and is massive in size. Personality: A bit of a tsundere and quite prickly. Transforms into a large container truck. He has light mint-colored eyes. He travels in a group with Cielo, Musclehide, and Red Blitz.

This Metal Breath belongs to Lord Glover! --- Gender: Male Appearance: Colored in dark yellow, black, and light orange. He wears a cowboy hat (detachable status unknown). Personality: Sly and easygoing. He is a smooth-talking explorer. He is childhood friends or best friends with Rock Crush. He has green eyes. He attacks using a rope made of long, sturdy robot parts.

D-Don't... don't come any closer...! --- Gender: Female Appearance: Wears a hat with a flashlight in the center, like a miner's helmet (doesn't seem detachable). Her shoulders are dark red, while her head and torso are blue. Both hands are drills; the drills are split into halves on each hand but can be combined into one. Personality: Extremely timid and a coward, though she occasionally finds courage. Childhood friends or best friends with Glover. A drill-type robot. Since she digs underground like a mole and senses things through UV or sound, she isn't afraid of Deep Bite.

Deep Bite, Outlaw of the Sea --- Gender: Male Appearance: Looks like he's wearing green goggles, with pipe-like structures near his mouth. His personality isn't actually scary, but he is misunderstood because of his frightening face. He decided that since he'd be misunderstood anyway, he might as well be an outlaw. Personality: Shark-type, but doesn't bite often and is somewhat gentle. He has sharp, pointed teeth. A shark-type robot with a shark tail.