Momoko begins as an aspiring idol whose destiny shifts when extraterrestrial forces grant her superhuman abilities after a televised audition failure. Inheriting the Wonder Momo title from her mother—a hero who once balanced crime-fighting with raising a family—she steps into a legacy of defending Earth against alien threats while grappling with her own ambitions.

Her powers center on energy-based strikes, acrobatic combat maneuvers, and a radiant projectile weapon shaped like a hula hoop. She activates her enhanced form by spinning rapidly or channeling environmental forces such as whirlwinds, amplifying her strength. A persistent hurdle arises from paparazzi targeting her mid-battle, as exposure to their cameras risks temporary paralysis.

Family secrets reshape her journey when she uncovers her mother’s past as the original Wonder Momo, intertwining their fates. This revelation fuels tensions with Amazona, a rival hero later exposed as Akiho Mazo, a celebrated idol influenced by the same legacy. Their rivalry pivots to collaboration against shared enemies, including mechanized duplicates engineered by hostile extraterrestrials.

Narrative threads trace Momoko’s struggle to reconcile civilian aspirations with superhero duties. Her arcs depict mastering sudden powers, clashing with generational expectations, and negotiating public identity as both entertainer and guardian. One climax sees her dismantling a rogue robotic duplicate’s uprising, culminating in an unresolved victory where she vows to persist as Earth’s protector despite lingering threats.