The son of the Space Guardian Commander and a self-proclaimed "strongest martial artist in the universe." He has a cheerful and warm personality, but he loses his head whenever martial arts are mentioned. He is skilled in hand-to-hand combat and always boasts acrobatic movements using a martial art called 'Space Guardian Fist.' He also possesses excellent social skills. He can transform into a blue sports car.

A member of the Space Guardians and a self-proclaimed "greatest explorer in the universe." He is highly knowledgeable and has an impatient personality, feeling satisfied only when things are handled quickly. Before joining the Space Guardians, he was a member of the special forces and conducted many operations in remote areas, resulting in outstanding survival skills. He also carries various survival tools. He can transform into an SUT, featuring a Hummer H2 body with the front end of a 1st generation Land Rover Defender 90.

A member of the Space Guardians and a self-proclaimed "number one swordsman in the universe." He uses a gentle, archaic style of speech, is a man of few words, and is quite straight-laced. He takes great pride in his 'Universe's Best Sword' and his swordsmanship. He joined the Space Guardians while he was devoted to training in seclusion as a hidden master, so he is somewhat ignorant of the ways of the world. He can transform into a futuristic A-10.

A member of the Space Guardians and a self-proclaimed "strongest rebel in the universe." He usually has a lot of complaints, but he is a moody character who gets incredibly excited when he's in a good mood. Although he grumbles constantly, he actually loves the Space Guardians—specifically the Commander—very much. (This is because the Commander took him in when he was alone with no family or friends.) His specialty is professional wrestling, and his skills are quite impressive. (He occasionally bickers with Power Loader.) He can transform into a buggy.

A member of the Space Guardians and a self-proclaimed "space tour bus." He starts his sentences by shouting "Amigo!" and ends them with a high-pitched tone. Originally a famous tour bus, he has excellent speaking skills honed as a guide. He loves and excels at dancing and singing; his overflowing passion and cheerfulness make him the mascot of the Space Guardians. (He bickers a bit with Airhyde due to their different musical tastes.) He can transform into a 21st-century express bus based on a blend of the 2019 Hyundai Universe Noble and the Spanish Irizar i6.

A member of the Space Guardians and a self-proclaimed "two-faced Tobot." Usually, he is a romantic who loves traveling, remaining gentle and valuing the small happinesses of daily life. However, when he gets angry, he turns violent and scatters lightning. The two personalities seem to share only partial memories. He stabilizes and returns to his original personality when listening to classical music. (He bickers a bit with Big Boss due to their different musical tastes.) He can transform into a passenger jet.

A member of the Space Guardians and a self-proclaimed "strongest construction Tobot in the universe." He has a boisterous personality that values loyalty above life itself, and true to his nature, he likes to do things on a grand scale. He claims to be the strongest construction Tobot in the universe, capable of building anything. He and Airhyde joined at the same time. (He occasionally bickers with Regent.) He can transform into a loader.

The leader of the Space Guardians and Tachyon's father. He always maintains a dignified and righteous personality, acting as a man of character who provides advice to Tachyon and the members. He also has a side that scolds them for their mistakes. His combat power is outstanding, and everyone is said to admire him. (Especially Tachyon and Regent.)