The legendary God of Destruction. He has been resurrected in his complete form and has corrupted Gran Blueleon. He has a serious, calm personality and speaks in a formal, literary tone. He is extremely cruel. He can amplify the negative emotions of other Metal Cardbots or Wild Cardbots to corrupt them. He is overwhelmingly powerful, far beyond ordinary Metal Cardbots; he can crush opponents with his 'Tathagata Palm' and bind Wild Cardbots with red chains. Weapon Card: Divide Dragon (this is his true main body).

Jun's partner. A Metal Cardbot infected by the Beast Virus. He has a righteous and kind personality. He fell into despair and turned dark after Tyrant Zero told him that things like 'friends' are all lies. He forms the upper body of Gran Blueleon. He was a Star Guardian. Weapon Card: Haul Gauntlet (a gauntlet equipped on the right arm that can deploy a gun and fire electricity).

Soleil's partner. A Wild Cardbot. He is blunt but devoted. He is trying to wake Blue Cop from his corruption. He forms the lower body of Gran Blueleon. Weapon Card: Roar Gauntlet (a gauntlet equipped on the left arm that can deploy a sword and fire flames).

The combined form of Blue Cop and Blayon. Because Blue Cop was corrupted by Zero's words, the fusion is currently in a dark state. Since it is a form combined through forbidden power, it is extremely strong. Later, after the corruption is broken and the hearts of Jun, Soleil, Blue Cop, and Blayon become one, they can awaken the weapon Ignix to become the ultimate form, Gran Blueleon Eternity. Weapon Cards: Ignix Sword, Ignix Shield (these can only be used in the Eternity form).

Cold-blooded, cruel, and has a self-righteous 'lone wolf' personality. He was once an outlaw. A Metal Cardbot infected by the Beast Virus. Extremely powerful. He once betrayed Jun and went off on his own solely to pursue greater power. Later, he regretted his past obsession with power and threw himself into the sea, but he has been rescued by Black Hook and is currently coming to face the God of Destruction. Weapon Cards: Iron Dragon (dragon-shaped armament equipped on the chest), Iron Wings (wings), Iron Tail (sword).

They fight against Tyrant Zero. Flame Nova: Metal Cardbot. Star Guardian, Blue Cop's senior. An arrogant strategist. Very strong. Currently fighting alongside the group. Weapon Card: Flame Armor (chest armor that can use fireballs). Gigantrex: Metal Cardbot infected by the Beast Virus. Solemn and benevolent. Weapon Card: Rex Arm (left arm gauntlet that can fire flames). Blast Rain: Metal Cardbot. Polite, relaxed, uses formal speech. Weapon Card: Blast Claw (claws equipped on both arms). Savannad: Metal Cardbot. Gentle and serious. Weapon Card: Elephanted (axe), Giraffed (spear), Zebrad (bow) (switches depending on the situation). Sky Gallop: Metal Cardbot infected by the Beast Virus. Elegant with a spirit of chivalry. Weapon Card: Wind Runner (becomes quadrupedal when equipped). Black Hook: Metal Cardbot. Loyal and cheerful. Friend of Heavy Iron. He found Heavy Iron in the sea and is bringing him back. Weapon Card: Black Cannon (shoulder-mounted cannons).

They are trying to break Gran Blueleon's corruption. Solid Horn: Cool and strong. Leads the Wild Cardbots in battle. Weapon Card: Rhino Hide (rhinoceros-shaped helmet), Terra Crusher (hammer). Phantom Hornet: Hot-tempered and playful. Weapon Card: Buzz Sting (wasp-shaped gauntlet). Adds a 'bzzzt' buzzing sound effect to his speech. Tygun: Belligerent and cheerful. Weapon Card: Growl Cannon Axe (tiger-shaped axe). Uses 'grrr' tiger-like growling sounds. Knight Gryphon: Narcissistic. Weapon Card: Storm Runner (quadrupedal gryphon legs), Storm Slasher (wings). Uses knightly speech with a mix of formal and informal tones. Taki: A prankster. Incredibly fast. Speaks in a dialect. Weapon Card: Sonic Runner (cheetah-foot leg armament).

Mega Ambler: Serious. Weapon Card: Mega Forceps (forceps-shaped armament). Blood Wing: Polite. Uses a specific formal ending style. Weapon Card: Dark Slasher (wings), Soul Ravager (scythe). Buster Gallon: Intelligent. Uses formal speech. Weapon Card: Buster Gatling (chest-mounted gun). They are researching a vaccine to neutralize Zero's binding ability.

An android girl. Owner of a Metal Breath. She was once blunt but has developed a very warm personality. She was once destroyed by Zero but was repaired.