Athena Glory serves as a prima undine for Orange Planet, celebrated as one of the Three Water Faeries alongside Alicia Florence and Akira E. Ferrari. Bearing the title "Seiren" (Heavenly Voice), her unparalleled singing talent enchants customers and supports her apprentice, Alice, in navigating demanding scenarios. She stands 170 cm tall, with a dark complexion, turquoise eyes, and short lavender hair crowned by a characteristic ahoge. Her Orange Planet uniform mirrors the company’s white and yellow palette, shifting between seasonal designs and a formal blue lace-adorned gown after she transitions from undine duties to pursue opera.

Though naturally reserved and prone to airheaded moments—such as neglecting to duck under bridges while rowing—she exhibits sincere devotion to Alice’s growth, blending mentorship with playful camaraderie. During her training years, she forged a bond with Alicia and Akira, echoing the dynamic later shared by Akari, Aika, and Alice. Her gentle demeanor contrasts with a laugh noted for its unexpectedly sharp tone.

Post-*Aria the Origination*, Athena steps back from active undine work to embrace opera, later appearing in *Aria the Avvenire* and *Aria the Crepuscolo*. While her demanding schedule occasionally limits interactions, she sustains ties to juniors like Alice and Anya. Her evolution from direct mentorship to artistic influence underscores her enduring role as a pillar of support within Orange Planet, channeling care through music while honoring her roots.