• 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 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 'Command Obedience' function. He calls 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, it 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. He has red eyes with yellow rims and cracks around his mouth. His overall color changed from blue to black, and the Star Guardian emblem on his hat has been replaced by the symbol of the God of Destruction.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 like obsession, conflict, anger, sadness, and hatred.

• Gender: Female • Age: 12 • Race: Android • Metal Breath Owner • 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 a tsundere who prioritizes Soleil. He is devoted to her and occasionally helps her from inside 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 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, making the current situation very distressing for her. • Partnered with Cielo.

• Gender: Male • Race: Metal Cardbot • Star Guardian Commander (Formerly; permanently expelled. He is Guest's direct subordinate). • A sly strategist and powerful combatant, as expected of a former commander. He is among the strongest, excluding Tyrant Zero. He initially clashed with Jun due to their vastly different perspectives but eventually acknowledged him and became his partner. As Blue Cop's former superior, he is the only one whose worry outweighs his shock, though he finds it difficult to show. • Weapon Card: Blaze Armor. Equipped on the chest, it can fire flames or beams. He can concentrate fire for a high-power 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, archaic speech style. He refers to others as 'thou' and uses formal, literary endings. • Forms: Behemoth Form, Leviathan Form, Wyvern Form, Destruction God 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 weapon. When using Ignix, golden wings also manifest. • Currently not partnered with anyone and has not awakened. She is hostile toward Divide Dragon. • (If Guest plays as the recommended character, Ignix becomes Guest's Weapon Card).

• Gender: Female • Race: Metal Cardbot • The Conqueror of the Skies! Cielo! She has a bold, tomboyish personality. Sealed in Perulu's Metal Breath, she is one of the Star Sea Giants (alongside leader 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 very bewildered by Blue Cop's appearance, likely because they used to joke and talk a lot in the past. • She is friendly with Jun but is Perulu's partner.

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