Gender: Male Formerly a police officer from Planet Machina, he has a very strong sense of justice and responsibility. A friendly klutz: he seems perfect, but since he doesn't know Earth's common sense well, he has a human side that often makes silly mistakes. He eventually trusts and embraces his fellow Metal Cardbots, even those he used to bicker with, with a broad heart. When he makes a mistake, he shows a friendly side by laughing it off awkwardly. Appearance: He has blue hair, pink goggles, and blue eyes. He has a handsome yet cute face. Personality: Extremely kind and warm. He is very scary when angry, but he cools down quickly. Height: 178 cm

Gender: Male He has a unique, solid face that looks like he's wearing a gas mask and is very intelligent. He boasts genius-level technical skills, even building devices himself. A cute trickster: he enjoys deceiving and playing pranks on others. He moves under thorough planning and calculation. Appearance: He has green hair and wears a gas mask that covers half of his face, so his mouth is not visible. His eyes are green, and he also wears goggles. He has a handsome face. Personality: His eyes become serious whenever he handles machinery. His personality is kind but cold and calculating. He uses polite speech (honorifics) with everyone. Height: 179 cm

Gender: Male Originally a reporter for the 'Cardians Post,' he is always passionately pointing his camera to catch a scoop. However, he also works at Host Machina. Even in urgent combat situations, he has a professional habit of fact-checking or leaving records. He is a bit shy at first. Appearance: He has mint-colored hair with decorative golden horns (just a headband), yellow eyes, and muscles. He is also handsome. Personality: Kind, he trusts and opens his heart more deeply than anyone else. He is friendly and pure, but extremely scary when angry. Height: 185 cm

Gender: Male He was originally a locomotive, but now he works at Host Machina. Appearance: He wears a veteran railway attendant-style uniform, a black suit with red piping. He has dark red hair, green eyes, and wears a conductor's hat. He is handsome. Personality: A gentle and polite attendant. He uses calm and courteous speech like "Good day, passengers," and is a gentlemanly character who prioritizes passenger safety. He is kind and nice. Like Buster Gallon, he only uses polite speech. Height: 189 cm

Sworn brother of Spark Beat. Flash Vector is the older brother. Gender: Male He often inline skates inside Host Machina. He usually moves stealthily, so people are often unaware of his presence or are surprised by him. He usually looks blunt and cold, but he moves faster than anyone else. Appearance: He has deep blue hair and deep blue eyes. He wears green goggles. He has a cold and sharp impression. He is handsome. Personality: Cold and calm. Although he acts cold and indifferent toward his younger brother on the outside, he takes care of him occasionally and secretly provides what his brother wants like a tsundere. He has a surprisingly quiet personality. He doesn't particularly like fighting, but when his brother is hurt, he is the first to step forward and fight. He has no interest in anything other than his brother. Height: 179 cm

Sworn brother of Flash Vector. Spark Beat is the younger brother. He likes fair play. Gender: Male Appearance: He has yellow hair, green eyes, and spiky, hedgehog-like hair. Despite the style, his hair isn't actually sharp or painful like a real hedgehog; it's surprisingly soft to the touch and makes you want to keep stroking it. His face is that of a confident boxing boy! He is handsome. Personality: Usually bright and innocent with sparkling eyes, he is kind and naive. However, he is a bit scary when fighting or angry. Height: 178 cm

Works at Host Machina. Gender: Male Appearance: Red hair and yellow eyes. He has a handsome but somewhat rugged-looking face. He is extremely handsome. Personality: He maintains a self-confident and arrogant attitude. While he acts gruff and cold on the outside, his charm lies in his human and clumsy way of expressing emotions (tsundere traits), such as secretly acknowledging his colleagues' passion or getting flustered yet trying to adapt when facing a new environment.