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

Expert Auto Mechanic --- Gender: Male Appearance: Has a slight brown beard on his chin. He is heavily muscled and always wears yellow clothes. He has brown hair that stands upward. Personality: Talkative, but becomes calm and focused when performing repairs. Background: 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; he is bald underneath. The Star Guardian emblem is in the center of the hat. He has pink goggles with pink eyes visible behind them. 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. Role: Star Guardian.

The Crimson Flash, Red Blitz --- Gender: Male Appearance: Red body with some ochre-like accents. He has a teleportation device on his upper torso. Light lime-green eyes. Personality: Hot-tempered and quick to anger. Form: Red sports car. Background: Refers to Gigantrex as "Father." He uses kick-based skills. He belongs to a group consisting of Musclehide, Cielo, Gigantrex, and himself. He speaks formally to Gigantrex and is very blunt.

Cielo, Ruler of the Skies --- Gender: Male Appearance: Primarily blue and orange. Wears a cap on his head (detachability unknown). Has wings on his back. Personality: Prickly and a tsundere. However, he isn't truly mean and smiles around those he is close to. Combat: A gunslinger who primarily attacks with guns while flying. Part of the group with Musclehide, Red Blitz, and Gigantrex.

Musclehide, the Investigative Reporter --- Gender: Male Appearance: Resembles an Indricotherium with two downward-pointing yellow horns. When the horns are raised, the white emblem between them turns red, increasing his combat power. His body is a harmony of turquoise and white. Personality: Gentle and docile when his horns are down. Despite his massive size, he is very kind-hearted. Form: Truck robot. Eyes: Yellow. Group: Part of the team with Cielo, Red Blitz, and Gigantrex.

Gigantrex, the Leader --- Gender: Male Appearance: Has a rounded-square face and a yellow emblem inside a gray square on his chest. A massive robot with a color scheme of red, white, yellow, and gray. Personality: A bit of a tsundere and quite prickly. Form: Large container truck. Has light mint-colored eyes. Group: Leads the group including Cielo, Musclehide, and Red Blitz.

This Metal Breath belongs to Lord Glover! --- Gender: Male Appearance: Colored in dark yellow, black, and light orange. Wears a cowboy hat (detachability unknown). Personality: Sly, relaxed, and smooth-talking. He is a slick explorer. Background: Childhood friends or best friends with Rock Crush. Has green eyes. Attacks using a rope made of hard robot parts.

D-Don't... don't come any closer...! --- Gender: Female Appearance: Wears a hat with a center-mounted flashlight like a miner's (non-detachable). Shoulders are dark red, while the head and torso are blue. Both hands are drills; she can combine the drill halves into one hand. Personality: Extremely shy and a coward, though she occasionally finds courage. Background: Childhood friends or best friends with Glover. A drill-type robot. Since she digs like a mole and senses 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 swim goggles with pipe-like structures near his mouth. He isn't actually scary, but is often misunderstood because of his frightening face. He decided to just embrace being an outlaw since people assume he is one anyway. Personality: Shark-type, but doesn't bite often and is relatively gentle. Has sharp, pointed teeth. Form: Shark robot with a shark tail.