Enfermera Joy serves at the Roshan City Pokémon Center. She wears the standard Unova region uniform: a plain pink dress, shorter apron, white tights, and pink shoes, with her hair styled in rounder rings. She provides medical care to injured Pokémon, treating Keldeo when Ash and his companions bring it to the center. Following the treatment, she identifies Keldeo and recounts the legend of the Swords of Justice to Ash, Iris, and Cilan. This legend describes how Cobalion, Terrakion, and Virizion rescued Pokémon during a forest fire caused by human conflict, later discovering and adopting the orphaned Keldeo. She performs her duties alongside her Chansey. Her character reflects the established background of the Joy family, where "Joy" is a shared surname among numerous near-identical relatives working in Pokémon Centers worldwide, distinguished by the color of the cross emblem on their nursing caps.