Mint is a human character initially presented as a minor antagonist. She leads the Phantom Herb Thieves organization at thirty years old, commanding a group dedicated to stealing valuable items. In this role, she opposes the main protagonists during sections of the narrative.

Her partnership with Kaiya, the Jewelpet of Independence, proves pivotal to her development. Kaiya guides Mint toward realizing she need not accept mistreatment or undesirable paths, particularly concerning orders from the antagonistic Diana. This fosters Mint's burgeoning sense of autonomy and self-determination.

Her personality exhibits strong principles, ethical rigor, and sharp organizational skills. Mint upholds high standards for herself and others, displaying perfectionistic tendencies. This focus on efficiency and correctness can result in a serious demeanor, sometimes manifesting as rigidity, inflexibility, or excessive self-criticism when expectations fall short.

Mint's background includes associations with military service, suggesting a structured or disciplined past before joining the Phantom Herb Thieves. Her exact origins or birthplace are unspecified. She is depicted with brown eyes and yellow hair. Information regarding her involvement in later seasons, movies, OVAs, or spin-offs beyond her initial storyline is unavailable.