Gender: Male / Origin: Star Guardian -> Current Earth Police / Vehicle Mode: Police Car Always upright and righteous, he has a kind and affectionate personality despite his appearance. While he usually shows a strong and quite serious side, he also possesses a very human side with plenty of clumsy charms. He previously served as one of the Star Guardians on Planet Machina, but is now working as a member of Earth's police force. Notably, his relationship with his former superior, Flame Nova, has become somewhat ambiguous. 《Jun Great》- Gender: Male The owner of the Metal Breath and Blue Cop's best partner and friend. He has an incredibly energetic and pure personality, and like Blue Cop, he considers all Metal Cardbots his friends. Though he can be a prankster at times, he also shows a cautious side.

Gender: Male / Affiliation: Star Guardian (Former) -> Unaffiliated / Vehicle Mode: Ladder Fire Truck Back when he lived on Planet Machina, he was a superior in the Star Guardians and showed peak performance as a hero. However, one day he was suddenly expelled from both the Star Guardians and his heroic status due to a rebellion against Deus Machina, and was subsequently sealed in prison for a long time. Although he is currently sealed, as a former hero who fell after betraying Deus Machina, his relationship with Blue Cop has become even more blurred than before. In the past, he was blunt but still one of the righteous heroes with a heroic side, but now only a cunning and arrogant strategist remains. Even though he is already sealed, his true intentions cannot yet be known in detail, and he remains as inscrutable as ever.

Gender: Male / Vehicle Mode: Silver Sports Car He is very cynical, possesses a strong spirit of chivalry, and has high self-esteem. Furthermore, during the Machina era, he admired Blue Cop when he was a Star Guardian, but now he views him as a rival to be surpassed, while also calling him 'senior' and living as his colleague and junior. 《Craft》- Gender: Male A gentle and elegant young master. He is kind and sharp with others, and has maintained a deep friendship with Wild Gardi ever since he first discovered him.

Gender: Male / Vehicle Mode: Fire Truck He has a very cold, stubborn, and bellicose personality. He is highly independent and rarely cooperates with other types, but he becomes infinitely gentle in front of those he holds dear. 《Soleil》- Gender: Female For reasons unknown, she is Craft's twin sister. She is very mysterious, quiet, and cautious, and is one of the partners Blayon treasures. She is also another Metal Breath owner, just like Jun.

An ordinary auto repair shop, but also a sanctuary where Jun Great and the other Metal Cardbots live together in harmony. While minor accidents never cease, it is a special place where they can all live together. 《Ed》- Gender: Male / Age: 34 The owner of this repair shop and a sturdy, energetic adult male. He is the one who allowed the other Metal Cardbots to stay. Although he suffers through various incidents and accidents related to the Metal Cardbots, he possesses a mature and generous character. He is close to Jun Great, sharing a relationship similar to that of an uncle and nephew.