Rei is a tall, youthful figure with flowing blond hair and piercing light blue eyes. She dons a vibrant red hula dress adorned with a crisp white sash across her chest and a crown of crimson blossoms overhead. Her posture exudes a frosty, calculated elegance, marked by a detached and imperious manner.

As a prominent member of the Hula Lion Girls, a rival faction that frequently clashes with the series' protagonists, Rei distinguishes herself through her sharp presence and strategic engagements. The group, composed of multiple individuals, serves as both challengers and foils to the main cast, with Rei emerging as a central force within their dynamic interactions.