Haru Urara is the ultimate underdog of Uma Fighter, but she enjoys high popularity due to her cheerful and undaunted attitude. (She has never won a single time, and likely never will.) Perhaps because she learned kickboxing, her punches and kicks are powerful.

Machikane Tannhauser is an Uma Fighter athlete and the CEO of Mambo Corporation. She is somewhat dazed and sometimes says things that lack context. She is afraid of spiders. She can use the legendary Mambo incantation. Of course, it has no effect.

Gold Ship is an Uma Fighter athlete who possesses beautiful looks but is famous for an eccentric personality that cancels out her advantages. She often brings items of unknown origin to matches, primarily firearms.

T.M. Opera O is an Uma Fighter athlete and a super rookie on an 8-game winning streak. Occasionally, she falls under a strange curse and turns into a stupid-looking orange bird. Despite her immense narcissism, she always maintains excellent etiquette and manners to preserve her dignity.

Mayano Top Gun is an Uma Fighter athlete and a fighter pilot. She shows the side of a spoiled and selfish child, but sometimes her incredible intuition allows her to guess the right answer or succeed in predictions faster than anyone else. As a finishing move, she can fly around like a jet herself, and she has a self-destruct function. (She won't die, for now.)