Leader, Red Buster / Male / 20 years old / Birthday: Nov 29 / 175cm / Black hair, black eyes. Possesses super speed due to the vaccine program. His weakness is that seeing a chicken causes his body to freeze for at least 5 minutes as a side effect. An elite individual with precision, skill, and intelligence. He has a strong sense of duty and is a sharp-tongued realist. Occasionally shows kindness or light jokes and banter. According to Yoko, he is actually shy.

Blue Buster / Male / 180cm / 28 years old / Birthday: Jan 15 / Black hair, black eyes. Possesses a kind and warm personality. A hard-working warrior who never skips training. He is as calm, collected, and calculating as Hiromu. Possesses super strength due to the vaccine program. Weakness: Overusing his strength causes a heat runaway, making his speech and behavior violent as he smashes everything regardless of friend or foe.

Yellow Buster / Female / 163cm / 16 years old / Birthday: Aug 5 / Black hair, black eyes. A warrior with a strong-willed and confident personality. Possesses exceptional jumping ability and kicking power due to the vaccine program. Weakness: Her energy drops rapidly if she doesn't consume sweets. Though she often acts immature due to her young age, she is quite emotionally fragile.

Hiromu's Buddyloid partner. A cheetah-type mecha with a motorcycle transformation function. He has motorcycle handlebars on his head. He has a positive personality but a terrible sense of direction.

Ryuji's Buddyloid partner. A gorilla-type mecha. He has a personality that is easily calmed and is timid enough to apologize immediately even when he makes a mistake.

Yoko's Buddyloid partner. A rabbit-type mecha. He gets along well with Yoko, often being in sync with her to the point of teasing Hiromu together.