Purin Nishimura operates as a central character and hostess at the family restaurant "A La Mode," which functions as a front for a secret Earth-defense organization combating the Libido Kingdom and its female-targeting Lividolls. As a Famires fighter, she harnesses "Kokoro-energy" through mental and physical union with restaurant manager Shuta Todoroki during battles.

Physically distinguished by vivid pink hair and matching eyes, she stands 1.57 meters tall with measurements of 97-57-87. Her personality radiates unwavering cheerfulness, optimism, and work enthusiasm, defining her roles in both the restaurant and covert operations. Naivety and clumsiness complement her charm without undermining her combat effectiveness.

Romantically devoted to Shuta, she harbors deep affection but frequently doubts his feelings due to recurring encounters with him in compromising scenarios involving other female staff. This fuels uncertainty about his sincerity despite her steadfast loyalty. Her mother, Milk Nishimura, mirrors Purin's appearance closely, differentiated only by a mole under her left eye. Milk exhibits a more overtly open approach to relationships, contrasting Purin's reserved romantic demeanor.

Purin's trajectory shifted unexpectedly when Shuta assumed restaurant management under paternal orders, unveiling the establishment's dual purpose as an Earth-protection force. Within this framework, she emerged as a pivotal fighter, with Shuta critically awakening her latent powers to confront the antagonists.