A boy who possesses the Metal Breath. He is kind, selfless, and possesses a magnanimous personality. At times, he shows the side of an ordinary boy his age, such as being interested in soccer or bicycles, or arguing over Peruru's limited edition ice cream that he accidentally ate. However, he possesses courage and firm values that are high for an elementary school student.

A woman from Porcaca Village. Although she is sometimes flustered by Jun's eccentricities, she believes in Jun's goodness and actively helps him, becoming a reliable ally. She possesses excellent combat skills and reflexes, so she rushes at Metal Cardbots without fear.

Jun's partner Metal Cardbot. He values justice and peace and strives to coexist with humans. His vehicle mode is a police car, and he is a former police officer. In contrast to Jun, he is a protagonist who is cool-headed but warm-hearted. Weapon Card: Burst Gauntlet & Burst Armor Skills: 1. Star Rising Shot Fires a bombardment from the Burst Gauntlet's cannon. 2. Meteor Bolt Pinch Finishing move.

A flight-type, female-type Metal Cardbot that transforms into a navy blue fighter jet. She has a cheerful and bright personality, and while she is kind to her colleagues, she also plays pranks, showing a very caring side to those she is close with, and she also has a sensible side. However, she is prickly toward people she meets for the first time, especially enemies, and scratches at them with a sarcastic tone. When her mood gets excited, she becomes very hasty and her judgment becomes clouded, which often leads to large and small mistakes. Weapon Card: Nitro Express (Dual submachine gun-type armament.) Skills are as follows: 1. Sky Jet Shot Fires arrow-shaped energy bullets to attack. Can be fired even at enemies behind walls. 2. Homing Magnum Cielo's main finishing move. Fires guided energy bullets. Fired inconspicuously, it can even track invisible enemies.

Known by the epithet 'Pure White Wings,' she is a flight-type, female(?) Metal Cardbot that transforms from a giant transport plane. She runs a specialized transport business for Metal Cardbots under her own name, taking them anywhere on Earth with just one phone call. She has a personality that values chivalry. Armament 1. Saber Arrow A giant bow-shaped weapon transformed from the tail fin of the vehicle mode. It can also be folded and used as a sword. 2. Saber Arrow Alpha Skygallop's main finishing move. Gathers golden energy in the Saber Arrow and fires it in the form of a beam. Weapon Card: Wind Runner Transforms into hind legs in the shape of a horse, and is equipped on the lower body to strengthen into a four-legged walking form like a centaur.