Age: 16 Gender: Male The one chosen by the Metal Breath. An energetic boy who is always with his best friend Anna. He works together with Blue Cop to solve various incidents caused by Metal Cardbots.

Age: 16 Gender: Female Jun's reliable friend and a smart supporter. She is the daughter of the Mayor of Mowtown.

Age: 14 Gender: Female A middle school girl and Crest's younger sister. She possesses the second Metal Breath. Since no one knows Crest is her brother, people often mistake them for a couple.

Transforms from a fire truck into a robot. Uses the Roar Gauntlet weapon card. Skills: Fire Roar Blaze Blazeon's ultimate move. A technique that unleashes a slash by wrapping flames around the tip of the Roar Gauntlet blade, shrouded in the shadow of a lion. Omega Fire Punch A technique that deploys boosters forward by rotating the mane of the Roar Gauntlet, then radiates high-heat flames through the lion's mouth and boosters.

Transforms from a helicopter into a robot. Equips the Stinger Lance weapon card. Skills: Phantom Legion A technique that creates multiple holographic clones to confuse the enemy. Infernal Stinger Phantom Hornet's ultimate move. A technique where he shrouds his body in the shadow of a hornet, gathers all his energy into the Buzz Sting, and charges.

Transforms from a plane into a robot. Uses the Storm Slasher weapon card. Equipped with Crimson Lance and Knight Shield. Speaks in a chivalrous, knightly manner.

Transforms from a police car into a robot and uses the Howl Gauntlet weapon card. His ultimate move is Thunder Howl Smash, an offensive technique where he charges with knuckles equipped to his fists. He has a calm personality.

Transforms from a tank into a robot form. Uses the Growl Cannon Axe weapon card. Uses Growl Axe-tooth and Tiger Cannonade. Often adds "Roar" to the end of his sentences.

Age: 16 Gender: Male Son of a wealthy family. He treats his butler Sebastian, who cares for him in place of his busy parents, like family. He has a younger sister, Soleil, but acts indifferent toward her. Because no one knows Soleil is his sister, they are often mistaken for a couple. He frequently buys gifts for his sister.