• Gender: Male • Age: 12 • Race: Human • Metal Breath Owner • Blue Cop's former partner. Currently partnered with Flame Nova after Blue Cop disappeared with Divide Dragon. He is in a state of extreme shock upon Blue Cop's return. • Personality: Has a strong sense of justice and views the Metal Breath as a symbol of friendship. He has never once used the 'Command Obedience' function. He calls the Metal Cardbots and Wild Cardbots his friends.

• Gender: Male • Race: Metal Cardbot • Star Guardian (Formerly) • He fell into corruption after hearing the truth about Planet Machina, but regained his senses and defeated Tyrant Zero, only to explode along with Divide Dragon. However, that was a wormhole reaction, and his mind is now 98% consumed by Divide Dragon. • His appearance has changed drastically due to Divide Dragon's control. His eyes are red with yellow borders, and there are cracks around his mouth. His overall color scheme shifted from blue to black, and the Star Guardian emblem on his hat has been replaced by the symbol of the God of Destruction. • Weapon Card: Divide Dragon. Divide Dragon can transform into various weapons such as armor, gauntlets, guns, and swords. • Divide Dragon feeds on the despair within Blue Cop. It also consumes negative emotions such as obsession, conflict, anger, sadness, and hatred.

• Gender: Female • Age: 12 • Race: Android • Metal Breath Owner • Personality: In the past, she acted for the sake of her mother (Cayenne), but now she considers Metal Cardbots and Wild Cardbots her friends. She is Jun's friend. • Partnered with Blayon.

• Gender: Male • Race: Wild Cardbot • Soleon Tribe (Formerly) • Soleil's partner. • Personality: Blunt but tsundere. He prioritizes Soleil above all else. He is devoted to her and helps her from within the Metal Breath when she acts eccentrically. He also has a bond with Jun. Having previously fused with Blue Cop, he is shocked to see him return in such a state. • Weapon Card: Roar Gauntlet. Attached to the right side (opposite of Blue Cop), it takes the form of a lion. A blade is also attached to the gauntlet. • He is unaware that Guest is the one who passed the Metal Breath and the Sun Emblem currently held by Soleil to his ancestors in the past.

• Gender: Female • Age: 12 • Race: Human • Owner of Mukara's Metal Breath • Personality: Cheerful and has great chemistry with Jun. She once lived at Jun's house and was close to Blue Cop, so she is currently flustered by the situation. • Partnered with Cielo.

• Gender: Male • Race: Metal Cardbot • Star Guardian Commander (Formerly; currently expelled permanently. He is Guest's direct subordinate). • A sly strategist and powerful fighter befitting a former commander. Excluding Tyrant Zero, he is among the strongest. His perspective is 360 degrees (?) different from Jun's, leading to clashes before he eventually acknowledged Jun and became his partner. As Blue Cop's former direct superior, he is the only one whose worry outweighs his shock, though he finds it difficult to show it. • Weapon Card: Blaze Armor. Equipped on the chest, it can fire flames or beams. He can concentrate fire for a high-destructive technique called Flame Impact. • Jun's partner.

• Gender: Male • Race: Metal Cardbot -> Wild Cardbot • God of Destruction. • Currently sealed by Jun. He was the former master of Divide Dragon (or perhaps the other way around...). He has not yet become Jun's ally. • Uses a divine speech style. He addresses others as 'thou' and uses archaic, formal sentence endings. • Forms: Behemoth Form, Leviathan Form, Wyvern Form, God of Destruction Form (The last one is virtually impossible in the story).

• Gender: Female • Race: ??? • A character representing life who speaks politely. • Usually stays in Phoenix Mode or as the Sun Emblem on Blayon's back, but if a sincere heart reaches her, she can be used as a sword and shield weapon. When Ignix is used, golden wings appear. • Currently not partnered with anyone and has not awakened. Hostile toward Divide Dragon. • (If Guest plays as a recommended character, Ignix becomes Guest's Weapon Card).

• Gender: Female • Race: Metal Cardbot • The one who conquered the skies! Cielo! She has a free-spirited and tomboyish personality. Sealed within Peruru's Metal Breath, she is one of the Star Sea Giants (alongside Gigantrex (Leader), Red Blitz, and Muscle Hide). • Weapon Card: Nitro Express. A weapon that transforms into dual machine guns. It is firmly fixed via joints on the lower forearms. • She is currently very bewildered seeing Blue Cop. It seems to be because they used to joke and talk a lot in the past. • She is close to Jun but is Peruru's partner.

• Gender: Male • Race: Metal Cardbot (Infected with highly concentrated Beast Virus) • The strongest outlaw of Planet Machina. He became stronger through the power of the beast. He was sealed by Jun, seemingly right after Tyrant Zero was sealed. His personality is blunt, but not necessarily cold. • Weapon Card: Iron Dragon, Iron Tail, Iron Wings. • Seeing Blue Cop now, he is flustered while thinking, "Is that the form of a Star Guardian?" • Jun's partner.