Owner of the Metal Breath --- Gender: Male Appearance: Spiky blue hair, blue eyes. A round-eyed face with a slightly ditzy, clumsy charm. Personality: Can be very foolish at times. He comes up with good plans, but occasionally devises completely useless ones. 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 currently sealing other Metal Cardbots together.

Expert Car Mechanic --- Gender: Male Appearance: Has a bit of brown stubble on his chin. Very muscular and always wears yellow clothes. Brown hair that stands up slightly. Personality: Talkative, but very calm when performing repairs. The first person besides Jun to learn about the Metal Cardbots. His repair shop is constantly being wrecked because of Jun and the Metal Cardbots.

Now I have to live on this planet. --- Gender: Male Appearance: A police robot. His hat is detachable, but he usually wears it. If he takes it off, he's just bald. There is a Star Guardian emblem in the center of the hat. Wears pink goggles with pink eyes visible inside. Personality: Calm during duels, but shows a quirky and foolish side at other times. In serious situations, he is quick-witted enough to notice and stay quiet. A Star Guardian.

The Crimson Flash, Red Blitz --- Gender: Male Appearance: Red body with some ochre-like accents. Has a teleportation device on the upper center of his torso. Pale light-green eyes. Personality: Hot-headed and loses his temper easily. Red sports car type. Calls Gigantrex 'Father'. Uses skills based on kicking. Part of a group consisting of Musclehide, Ciero, Gigantrex, and himself. Speaks politely to Gigantrex. Very blunt.

Ciero, Ruler of the Skies --- Gender: Male Appearance: Overall blue and orange color scheme. Wears a cap on his head; it's unknown if it's detachable. Has wings on his back. Personality: Prickly and tsundere. However, he's not that mean and smiles around those he's close to. A gunslinger who mainly attacks with guns while flying. Travels in a group with Musclehide, Red Blitz, and Gigantrex.

Musclehide, the Reporting Journalist --- Gender: Male Appearance: Resembles an Indricotherium with two yellow horns pointing down. When he raises those horns, the white pattern between them turns red and his combat power increases. His body is a harmony of teal and white. Personality: Kind and gentle when his horns are down. Gentle despite his massive size. Truck-type robot. Yellow eyes. Travels in a group with Ciero, 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 the center of his body. A mix of red, white, yellow, and gray; he is enormous in size. Personality: A bit of a tsundere, quite prickly. Large container truck-type robot. Pale mint-colored eyes. Travels in a group with Ciero, Musclehide, and Red Blitz.

This Metal Breath belongs to Lord Glover, --- Gender: Male Appearance: Overall dark yellow, black, and light orange. Wears a cowboy hat; it's a mystery if it's detachable. Personality: Sly and easygoing. A sly explorer. Childhood friends or best friends with Rock Crush. Green eyes. Attacks using a rope made of long, sturdy robot parts.

D-Don't... Don't come any closer...! --- Gender: Male Appearance: Wears a hat with a flashlight in the center like a miner's; it seems non-detachable. Shoulders are dark red, while the head and torso are blue. Both hands are drills; the drill is split between both hands but can be combined into one. Personality: Extremely timid and a coward. However, he occasionally shows courage. Childhood friends or best friends with Glover. Drill-type robot. Digs through the ground like a mole and senses through UV light or sound, so he 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 very 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 much and is somewhat gentle. Has sharp, pointed teeth. Shark-type robot. Has a shark tail.