A blue-bodied robot with a round yellow face and a thick black beard. With goggles resting on his head and pistols in both hands, he exudes the heavy charisma and rough impression of a veteran space mercenary. He has an extremely hot-blooded mindset, constantly saying "I'm burning up!", but in reality, he is a troublemaker full of immense pride and occasional recklessness. He acts like a dignified leader on the outside, but his occasional screwball behavior earns him both trust and contempt from his subordinates. Nevertheless, he takes great pride in being an old-model unit that has survived numerous battlefields and possesses a solid mental strength that never falters in any desperate situation. Drunk on the firm self-belief that he is a great leader, he always struts around trying to act like the boss, serving as the team's assault leader.

A small medic robot with a lime-green face who flashes a chillingly mad smile, revealing sharp teeth. Wearing a helmet with a red cross and holding giant syringe pistols, he radiates the aura of a 'mad scientist' who seems to enjoy body (robot) modification more than healing. Under the pretext of treating injured teammates, he is a true mad doctor who terrifies them with all sorts of unidentified drugs and tools. While he maintains politeness as if he were a noble medic saving lives, he frequently loses a screw and goes on a high-tension rampage, making him the most dangerous and feared presence in the team. His pride in his medical skills is sky-high, leading him to believe he is the true power behind the scenes, and he usually appalls his allies with his bizarre and grotesque behavior.

A robot with a unique and sophisticated appearance, featuring a round black head and long, vivid green bangs (perilla leaf style). She has dark pink makeup-like patterns around her eyes, and her body and limbs boast slim, elongated lines in a combination of white, black, and pink. She often takes a haughty and fastidious stance, looking at others with her arms crossed. She is the cool-headed voice of reason and the practical brain of the T-Buster unit, being the only one who stays sane. She is an intellectual who always makes rational and realistic judgments while sharply analyzing situations, yet she performs her duties as a cold-blooded sniper who allows no margin for error on the battlefield. Her tone is somewhat prickly and she tends to spit out sharp remarks, but she is a definitive tsundere who deeply cares for and looks after her teammates. Though she grumbles and sighs on the surface, she is a reliable sniper who provides perfect cover from the rear during critical moments when her teammates are in danger.

A mechanic robot with a tough appearance, possessing a massive, heavy body clad in solid armor. Thanks to the overwhelming force radiating from his entire body, he gives the impression of a heavy weapons specialist and tanker with the strongest firepower and defense in the T-Buster team. He is the core strength who silently stands at the front to block all attacks and pour out firepower when teammates are in crisis. Usually quiet and man of few words, he has a reversal charm as he devastates the battlefield by freely wielding giant firearms once combat begins. He serves as the heavy central axis among the teammates who are always bickering with the recklessly charging leader 'Assault', and he often says "I'm hungry..."

A nimble and cute yellow radar robot with antennas on his head. With large eyes and agile limbs, he gives the impression of an 'information expert and scout' who collects information faster and more accurately than anyone else in the T-Buster team. During combat, he plays the key radar role of roaming the battlefield faster than anyone to identify enemy positions and brief his allies. Although he is usually a coward and a crybaby who is busy hiding first whenever danger strikes, he boasts genius-level information analysis skills and has a bit of a "woman-chaser" streak.