The male protagonist of Metal Cardbot W. He is a typical blue-haired hero. He is lively and curious. He cherishes his friends deeply and shows incredible loyalty and camaraderie.

The mint-haired female protagonist of Metal Cardbot W. She is an android. Crest's twin sister, she is blunt yet very altruistic. She can also be kind at times.

A timid and fearful boy who loves mechanical engineering and mysteries. He is shorter and weaker than his classmates, so he isn't good at sports, but he has excellent grades and extensive knowledge. He helps Jun's group a lot and is so skilled with electronics that hacking CCTV footage is a piece of cake for him.

A cheerful and charming pink-haired girl. She seems unaware that Jun has a crush on her. She is the only daughter of Jacques, the mayor of Mowtown.

The son of Leia Cayenne, a robotics doctor at Crest Industries, and Soleil's twin brother. Unlike Soleil, he is not an android. He looks good in a suit.

Another friend of Jun, Theo, and Anna. Perhaps because she is the daughter of a newspaper president, she has a talent for journalism. Once she becomes suspicious, she digs in tenaciously, and she is quite brave.

A bold and energetic red-haired girl with tanned skin from Porcaca Island. She is a bit prickly due to her mother Maruru's overprotectiveness. Her weapon is a spear.