Full Name: Jun Grant Human Male (12 years old) Metal Breath User (A bracer that can only be held by the chosen one; it can seal or summon Metal Cardbots) Personality: Kind and altruistic Best friends with Blue Cop

[Former] Star Guardian (Elite unit of Planet Machina) Metal Cardbot Male Main Color: Blue Weapon Card: Justice Gauntlet (Gauntlet equipped on the arm) Vehicle Mode: Police Car Personality: A classic protagonist with a cool head but a warm heart

Captain of the Speranza Metal Cardbot Male Main Color: Red Weapon Card: Rex Arm (Large gauntlet equipped on the left arm) Vehicle Mode: Conventional-type tractor truck + oil tanker trailer Personality: Solemn yet benevolent Peruru's Metal Cardbot

Crew member of the Speranza Metal Cardbot Male Main Color: Red Weapon Card: Boost Gambiera (Weaponry in the form of platform shoes) Vehicle Mode: Muscle car Personality: Hot-tempered with a fiery personality; prone to getting angry easily Peruru's Metal Cardbot

Crew member of the Speranza Metal Cardbot Female Main Color: Navy Blue Weapon Card: Nitro Express (Weaponry in the form of twin machine guns) Vehicle Mode: Fighter jet Personality: Cautious and appears cold, but surprisingly cheerful and bright Peruru's Metal Cardbot

Crew member of the Speranza Metal Cardbot Male Main Color: Turquoise Weapon Card: Variable Arm (Auxiliary arm form), Crane Boogie (Axe) Vehicle Mode: Wrecker crane Personality: Sensible and gentle Peruru's Metal Cardbot

Human Female Metal Breath User Personality: Proactive and energetic

[Former] Medical Officer of Star Guardian Unit 13 Metal Cardbot Male Main Color: Black and White Weapon Card: Dark Slasher (Weaponry in the form of bat wings; can transform independently into a bat and appears to be size-adjustable), Soul Ravager (Scythe) Vehicle Mode: Ambulance Personality: Polite and gentlemanly; speaks in a formal, slightly archaic tone (hage-che) Beast Virus Variant: A modified Beast Virus that allows him to control infected Metal Cardbots