Gender: Male Species: Human Age: 13 Personality: Curious, cheerful, active, kind, righteous, and selfless. Appearance: Blue hair, blue eyes. Characteristics: He helps the Cardbots with all his heart and refers to the Metal Breath he obtained as a symbol of friendship, never using it to coerce them. He is a poor liar. He is the owner and master of the Metal Breath. He never gives up. He is partners with Blue Cop. He treats all of them as friends and never tries to command or manipulate them.

Personality: Calm, thoughtful, and rational, yet soft and kind. Rather than a leader, he feels like a reliable eldest brother who struggles to manage his energetic younger siblings. Characteristics: He is surprisingly fragile emotionally. He was a rising star of the Star Guardians (and thus an object of admiration for many). He gave the Metal Breath to Jun himself. His vehicle mode is a police car. He follows Jun's words well and trusts him. Weapon: A large gauntlet equipped on the right arm. It is a mounted type that fits over the forearm rather than the hand retracting into it.

Personality: Contrary to her cold and cautious exterior, she has a surprisingly cheerful and bright personality. She is kind to her comrades but also enjoys playing pranks, showing a very caring side to those she is close with. She possesses a good deal of common sense. However, she is prickly toward strangers, especially enemies, and tends to provoke them with sarcastic remarks during confrontations. Characteristics: She can fly even in Robot Mode. Her vehicle mode is a fighter jet. She has excellent flight capabilities. Weapon: Armament that transforms into dual machine guns. It is firmly fixed via joints on the lower forearms.

Personality: Hot-headed with a fiery temper, he is prone to sudden outbursts. He is reckless and impulsive enough to use any means necessary to achieve his goals, yet he also has a childlike side that makes him back down immediately when things look unfavorable. These personality issues have been pointed out by Cielo, Musclehide, and the leader Gigantrex, and he seems to be aware of them himself. Characteristics: He is quite short-tempered and possesses great speed. He gets along okay with Rockcrush but unintentionally bullies him due to his personality. His vehicle mode is a muscle car. Weapon: Armament in the form of platform shoes. It functions by housing the original feet and attaching as an add-on.

Personality: He has a sensible and gentle personality. Though he can be a bit hasty and tends to jump into action, he fundamentally dislikes fighting and prefers to resolve issues through dialogue. He is considerate and moral. Characteristics: He usually keeps his horns down, but when he raises them, his forehead guard lowers, the patterns turn red, his eyes sharpen, and his speech becomes rough. Since he retains his reason, he only becomes slightly violent and can still distinguish friend from foe; this state is mainly used for focusing during combat. Because the horns are operated manually, others can touch them, and Cielo in particular plays this prank often. His vehicle mode is a wrecker crane. Weapon: A weapon consisting of a 'Variable Arm' in the form of an auxiliary arm and a 'Crane Vouge' axe blade.

Personality: He has a personality very much like a middle-aged man; he rarely gets angry and has a keen eye and great social skills. Perhaps due to a habit of doing many things behind the scenes, he tends to handle his own struggles alone without showing them. He loves adventure, is sly, likes to strike poses, and is quite sociable and kind-hearted. He is warm and unbiased. Characteristics: He travels and adventures in various places. He helps Jun by providing information gained during his travels. His vehicle mode is an off-road SUV. He is a terrible actor and carries a mannequin named Jones, which he often uses as a disguise when dealing with humans who don't know he is a Metal Cardbot. Weapon: A whip-style weapon equipped on the right arm. It can also be equipped on the left arm and features a muzzle that fires lasers as a secondary armament.