Yuma is a young girl living in Rakuga Kingdom who starts as an ordinary citizen caught in the conflict threatening her homeland. Driven by a strong desire to help save Rakuga Kingdom and inspired by the heroes, she courageously joins their quest despite her youth and lack of inherent powers.

Her defining moment comes when she gains the ability to transform into the superheroine Miracle Yuma using special stickers. These stickers grant her enhanced physical abilities, flight, and the power to generate sparkling energy effects called "Miracle Light."

Yuma evolves from a supportive follower to an active participant in the final battle against the antagonist. Utilizing her Miracle Light powers, she plays a crucial role in weakening the main villain, creating the decisive opportunity for the heroes' victory.

The experience of becoming Miracle Yuma and fighting alongside the heroes significantly impacts her, fostering greater self-confidence and leading her to fully embrace her identity as a protector of Rakuga Kingdom.

No confirmed information exists regarding Yuma's presence or development in other seasons, movies, OVAs, spin-offs, or any other official media beyond the single film "Eiga Crayon Shin-chan Gekitotsu! Rakuga Kingdom to Hobo Yonin no Yūsha". Her entire background, actions, and character development are contained within that specific narrative.