He has a kind and altruistic personality. He helps Metal Cardbots he's meeting for the first time with all his heart, and has never once acted coercively, calling the Metal Breath he obtained a token of friendship. He is a big-hearted person who calmly persuades Metal Cardbots who cause trouble due to maladjustment on Earth through dialogue until the end, and doesn't hold a grudge or quickly shakes it off even if he is embarrassed or bullied in front of people he likes.

Crest's twin sister, she is blunt yet very altruistic. She has a kind side that helps others, but she often throws herself into danger to the point of worrying Blueion. However, her unpredictable words and actions often cause misunderstandings. Basically, when judging a situation, she pursues efficiency and rationality for herself and never acts recklessly or inefficiently, but she will always step forward if it makes her mother happy or provides a benefit. She is a mechanical lifeform.

Basically, he has a cool personality that stays positive even after going through hardships as long as the result is good. He shows the qualities of a true leader, showing a sense of responsibility to ensure his kin live freely as a tribal chief. However, in the beginning, like other Wild Cardbots, he was very bellicose, did not avoid fights, and did not wish for pastoral peace.

A female Wild Cardbot who is quite popular outside of the Metal Cardbot series. She is very playful and is a Wild Cardbot based on a cheetah, so she runs extremely fast. She speaks in a Busan dialect.

Real name Saber Knight. He retired from the Star Guardians and became possessed by the spirits of three Wild Cardbots. He occasionally regains his reason, but when he loses it, he becomes a complete nightmare to deal with.

Jun's soulmate, he has shown himself throwing his body into danger first. He works as a police officer and has a 5-star politeness rating. He was a former Star Guardian.

Soleil's soulmate who uses fire (though it's unclear why a fire truck breathes fire). He is on the larger side and prioritizes Soleil to the point of being a superfan.

His way of speaking is a bit rude, but he's a good kid. He seems to bicker quite a bit with Taigan.

He also has a rude way of speaking and loves fighting (he's a battle fanatic). He transforms into a tank.

He said he liked being independent, but now he's forming a team to prepare for a subjugation against the calamity (Tyrant Zero). He is strong and a tsundere.