Princesa Memoria anchors Henderland's backstory and conflict. Once Henderland's princess, she was captured by the twin sorcerers Joma and Makao, who imprisoned her soul within a small dancing doll named Toppema Mappet. This enchanted vessel became her primary physical form, concealing her true identity throughout the narrative.

As Toppema Mappet, she actively sought allies against Joma and Makao's dark magic. Recognizing only a living being could fully wield them, she entrusted Shinnosuke Nohara with magical cards capable of countering the villains' powers. The doll form visibly weakened after expending significant energy, particularly during magical confrontations like those with Chokirin, reflecting the toll of her efforts.

Her past reveals Prince Gorman rescued her from a dragon, only for both to be cursed by Joma and Makao. While her soul inhabited the doll, Prince Gorman's essence was trapped within a snowman construct. This curse extended to Henderland, enabling the twins to dominate its magical inhabitants.

Following Joma and Makao's defeat, the enchantments shattered. The doll form vanished as Princesa Memoria regained her true body. She directly intervened, melting the snowman to free Prince Gorman. Restored, she expressed gratitude to Shinnosuke for his crucial role in breaking the curses. Her final act involved presiding over the restored kingdom's celebration with Prince Gorman, marking Henderland's return to peace.

Alternative spellings like "Princess Memory Mimori" and "Princess Memory Mitsumori" consistently refer to this character.