Athena Glory mentors undine trainees at Orange Planet. She ranks among Neo-Venezia's legendary "Three Water Faeries" alongside Alicia and Akira, celebrated as premier undines from training through their professional careers. Following her retirement from active gondolier duties, she shifts to a career as an opera singer, maintaining community ties through ongoing mentorship and occasional performances.

Athena exhibits an airheaded personality, often becoming distracted or unaware of her surroundings, like forgetting to duck under bridges while rowing. Despite this, she possesses deep care and quiet attentiveness for her primary student, Alice, supporting her through challenges. Her demeanor remains generally reserved yet content within social settings.

Renowned for her exceptional "Heavenly Voice," Athena employs her singing talent both to entertain customers and to assist Alice during difficult moments. Her distinctive laughter sometimes manifests unusually, potentially sounding like anger.

Physically, Athena stands 170 cm tall with turquoise eyes, a dark complexion, and short lavender hair featuring a distinctive ahoge. She typically wears Orange Planet's white and yellow undine uniform, complete with a circular hat and calf-length boots. Seasonal variations include a summer outfit with a cropped blouse and ankle-length dress, and a winter version featuring a cape-style top, long sleeves, and tights. Following her shift to opera, her appearance changes significantly, marked by blue gowns with decorative lace and ankle-length wavy hair.

Her background includes undine training alongside Alicia and Akira, involving joint practice sessions mirroring those of their juniors. Athena's guidance of Alice reflects her commitment to nurturing the next generation, a mentorship she continues even after retiring from active gondolier duties.