Candy is a young, sheep-like fairy from the kingdom of Märchenland, home to fairy tale characters. Her mission sends her to Earth to find the five legendary Pretty Cure warriors. She must gather Cure Decor tokens, embodiments of the Märchenland queen's happiness power. Collecting these tokens is vital to revive the sealed queen and prevent the "Worst Ending" pursued by the antagonists of the Bad End Kingdom.

Candy possesses a cheerful, energetic personality marked by childlike enthusiasm. She exhibits a strong fondness for fashion, hairstyles, and play. She speaks in third-person, adding "kuru~" to her sentences, a trait reflecting her curly ears and tail. Her youthful demeanor includes moments of distress or tearfulness, and she relies heavily on her older brother, Pop, for guidance.

In the movie "Eiga Smile Precure: Ehon no Naka wa Minna Chiguhagu!", Candy accompanies Cure Happy (Miyuki Hoshizora) into the Picture Book World. There, Candy and Miyuki become entangled in an altered Cinderella fairy tale narrative, participating in the mixed-up story sequence.

Across the series, Candy's latent significance emerges. In pivotal battles, her deep emotional bonds with the Pretty Cure awaken dormant powers, enabling crucial enhancements like the Rainbow Healing technique. Ultimately, Candy transforms into Royale Candy, her true form as heir to Märchenland's throne. This state grants her a human-like appearance featuring blonde hair, a crown, a frilly dress, and functional wings. As Royale Candy, she directly aids the Pretty Cure in their final battle against Pierrot, contributing to the group's ultimate purification attack. This evolution from a support fairy to Märchenland's future queen highlights her growth beyond a mascot role.