Nuts is a 14-year-old human girl entrusted as one of Mint's two human companions who know her secret identity as a magical princess from another world. Gentle and family-oriented by nature, she demonstrates strong responsibility through her actions. Her interests include reading and cooking, complemented by practical skills applied to managing daily operations at the Happy Shop gift store run by Mint's aunt, Herb. This role frequently involves compensating for Mint's occasional forgetfulness or lack of direction.

She wields a magical synthesizer brooch enabling transformation sequences, granting her capabilities to assist Mint during missions. Her supportive duties encompass helping Mint adapt to human society, navigate interpersonal challenges, and maintain her cover while Mint fulfills her royal duty to restore human hopes and dreams.

Throughout the series, Nuts forms a close friendship with both Mint and the other chosen companion, Plum. This trio works collectively to address problems faced by community members visiting the Happy Shop. A significant moment in her development occurs when Plum requires emergency hospitalization; Nuts participates in the magical intervention ensuring timely medical care, reinforcing her loyalty and the group's unity. This incident contributes to the broader restoration of positivity affecting both worlds.