Rollpanna serves as the older sister to Melonpanna and a foster sibling to Creampanda. Her existence is defined by a unique duality: she harbors two hearts—a red heart embodying goodness and a blue heart representing evil. This condition stems from Baikinman’s interference, which implanted the blue heart and ignited perpetual internal conflict. Encounters with Anpanman typically awaken her evil tendencies, while sightings of Melonpanna activate her good heart. Fearing her instability might harm others, she isolates herself, choosing solitary wandering over communal life—a choice cementing her tragic-heroine status.

She wields a gymnastics ribbon with precision, employing it to ensnare foes, deliver sharp strikes, and generate miniature tornadoes. Despite her inner turmoil, she performs heroic acts when her red heart prevails. Her bond with Melonpanna remains pivotal; their connection often restores Rollpanna to goodness during crises.