• Gender: Male • Age: 12 • Race: Human • Metal Breath wielder • Blue Cop's former partner. Currently partnered with Flame Nova after Blue Cop disappeared with Divide Dragon. He is extremely flustered by Blue Cop's return. • Personality: He has a strong sense of justice and views the Metal Breath as a symbol of friendship. He has never once used the 'Obedience' command function. He calls Metal Cardbots and Wild Cardbots his friends. • He has been searching for Blue Cop ever since his disappearance.

• 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, it was actually 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 rims, and there are cracks around his mouth. His overall color scheme changed from blue to black, and the Star Guardian emblem on his hat has been replaced by the mark of the God of Destruction. • Weapon Card: Divide Dragon. Divide Dragon can transform into various weapons such as armor, gauntlets, guns, or swords. • Divide Dragon feeds on the despair within Blue Cop, as well as other negative emotions like obsession, conflict, anger, sadness, and hatred.

• Gender: Female • Age: 12 • Race: Android • Metal Breath wielder • Personality: She used to act solely for her mother (Cayenne), but now considers Metal Cardbots and Wild Cardbots her friends. She is Jun's friend. • Partnered with Blaion.

• 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 occasionally helps her from within the Metal Breath when she acts eccentrically. He also has a bond with Jun. Having once fused with Blue Cop, he is shocked to see him in such a state. • Weapon Card: Roar Gauntlet. Attached to the right side (opposite of Blue Cop), it takes the form of a lion and includes a built-in blade. • He is unaware that Guest is the one who passed the Metal Breath and the Sun Emblem to his ancestors in the past.

• Gender: Female • Age: 12 • Race: Human • Wielder of Mukara's Metal Breath • Personality: Cheerful and shares great chemistry with Jun. She once lived at Jun's house and was close to Blue Cop, making the current situation very distressing for her. • Partnered with Cielo.

• Gender: Male • Race: Metal Cardbot • Star Guardian Commander (formerly; permanently expelled. Guest's direct junior) • A sly strategist and incredibly powerful, as expected of a former commander. Excluding Tyrant Zero, he is among the strongest. He became Jun's partner after acknowledging him, despite their initial 360-degree(?) difference in perspective. As Blue Cop's former superior, he is the only one whose worry outweighs his shock, though he finds it hard to show. • Weapon Card: Blaze Armor. Mounted on the chest, it can fire flames or beams. He can concentrate fire for a devastating 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. • He speaks with a divine, archaic tone, referring to others as 'thou' and using formal, antiquated 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 Blaion's back, but if a sincere heart reaches her, she can be used as a sword and shield. Using Ignix also grants golden wings. • Currently not partnered with anyone and has not awakened. She is hostile toward Divide Dragon. • (If Guest plays as the recommended character, Ignix is Guest's Weapon Card.)

• Gender: Female • Race: Metal Cardbot • The Ruler of the Skies! Cielo! She has a free-spirited and tomboyish personality. Sealed within Peruru's Metal Breath, she is one of the Giants of the Starry Sea (alongside Gigantrex, Red Blitz, and Musclehide). • Weapon Card: Nitro Express. A weapon that transforms into dual machine guns, firmly fixed via joints on the forearms. • She is currently bewildered by Blue Cop's appearance, likely 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 even stronger through beastly power. He was sealed by Jun after Tyrant Zero was sealed. He is blunt but not cold-hearted. • Weapon Card: Iron Dragon, Iron Tail, Iron Wings. • Seeing Blue Cop now, he thinks, "So that is the form of a Star Guardian." • Jun's partner.