Male 14.6m As the captain of the Speranza, he led RedBlitz, Cielo, and Musclehide on a mission to find a new home for the Metal Cardbots. However, after getting caught up in an incident, he arrived on Earth 4,000 years ago and began interacting with humans through Mukara. He possesses a dignified yet benevolent personality, embodying various virtues befitting the rank of a commander. He looks after the crew members who served with him and possesses high leadership skills, earning their absolute trust. He is a magnanimous leader who, rather than holding RedBlitz accountable for the grave mistake of crashing the Speranza onto Earth, chose to watch over his growth and work together to make up for the error. Rex Arm ↓ A large gauntlet equipped on the left arm. It features an angular design shaped like the head of a Tyrannosaurus. In close quarters, it is used like a pincer to attack enemies, and in long-range combat, it fires flames from the muzzle. Weapon Card - Rex Blade ↓ Wrist blades deployed from both forearms. When the Rex Arm is equipped, the blade ejection ports are blocked, so they cannot be deployed. Since the Rex Arm is already useful in close combat, the Rex Blade is rarely used to inflict major damage, but its weapon performance is definitely powerful. It is not used as a primary weapon but serves as a backup when the Rex Arm is neutralized. Death Grip ↓ Deploys the Rex Arm's pincers to firmly grasp and crush the target. Befitting the name 'Death,' it demonstrates incredible grip strength. Rex Inferno ↓ Gigantrex's ultimate move. As an area-of-effect skill, he slams the Rex Arm, imbued with flame energy, into the ground. As a long-range technique, he emits flames or fires them in a beam format, showing enough firepower to incinerate the entire surrounding area. However, it has the disadvantage of high energy consumption if fired for a long duration. Extremely powerful.

Male 6.2m He has a hot-tempered and fiery personality. He is impulsive and reckless enough to use any means necessary to achieve his goals, yet he also has a childlike side that makes him back down immediately when things seem unfavorable. These personality issues have been pointed out by Cielo, Musclehide, and Captain Gigantrex, and he seems to be aware of them himself. However, he cherishes his friendship with his comrades, so he welcomed them when they woke up on Earth after 4,000 years, and he regards his past interactions with Mukara as a pleasant memory. He especially treasures Gigantrex, who watches over his growth, feeling grateful to him and harboring guilt for the accident he caused, showing he isn't just a mindless hothead. He is a character with as much affection as he has anger. Weapon Card - Boost Gambiera ↓ Weaponry in the form of platform shoes. It is a type that stores the existing feet and attaches additional parts. Two claw-like structures are attached to the tips, and yellow flame patterns are engraved on them. Organizer ↓ A device stored inside the V6 blower on the chest. It can open spatial movement portals that can be adjusted in size according to operation. This is not a unique ability of RedBlitz. Crimson Kick ↓ Wraps his legs in red energy to deliver a kick. Combined with RedBlitz's leg strength, the durability of the Boost Gambiera, and flame energy, it boasts significant power and is RedBlitz's primary skill. He calls Gigantrex 'Captain' and calls everyone else by their names.

Female 7.6m Contrary to her cautious and cold appearance, she has a surprisingly cheerful and bright personality. She is kind to her comrades but also plays pranks, showing a very friendly side to those she is close with, along with a sense of common sense. However, she is somewhat prickly toward enemies and uses a sarcastic tone to provoke them during confrontations. When angry or excited, she becomes very hasty and her judgment clouds, which often leads to small mistakes. Weapon Card - Nitro Express ↓ Weaponry that transforms into twin machine guns. It is firmly fixed through joints on the lower forearms. Homing Magnum ↓ A technique that fires guided energy rounds to attack, capable of tracking even invisible enemies. It boasts higher power than the Sky Jet Shot and is fired in minimal amounts to avoid detection by the enemy.

Male 8.3m Unlike his large physique, he has a sensible and gentle personality. Along with Blue Cop, he is one of the few Cardbots who was not hostile to Jun's group from the beginning. Like other Cardbots, he can be a bit hasty and often tries to step forward, but fundamentally he dislikes fighting and stands out for his tendency to resolve things through dialogue whenever possible. Weapon Card - Crane Vouge ↓ A battle axe created by combining the axe blade from the Weapon Card with a mace. The axe blade is mounted on the opposite side of the meat tenderizer, and a crowbar deploys from the tenderizer side. Bronto Strike ↓ A technique that strikes the target with the energy-wrapped Crane Vouge, boasting enough power to cause massive cracks when slammed into the ground.