Lily holds the dual position of Heavenly King and beast general in the Demon Army. Her demi-beastman heritage is marked by prominent wolf ears and a long, fluffy tail, described as white in light novels yet matching her orange hair in colored illustrations. She possesses red eyes and maintains a childlike, petite stature. Her typical attire includes a brown half-top exposing her midriff, circular ear piercings, neck bangles, and bracelets.

Personality-wise, she embodies simplicity, honesty, and earnestness, tackling tasks with wholehearted effort. Despite formidable combat prowess, she exhibits significant naivete and a childlike perspective, often disrupting serious situations through unintentional foolishness. This extends to her professional duties, where mission reports resemble a grade schooler's homework. Driven by beastkin cultural law dictating that defeat by someone of the opposite sex signifies marital fate, she maintains a persistent belief that Leo is her destined mate. This conviction fuels her relentless pursuit of him despite his repeated rejections.

Originally responsible for managing the Demon Army's beastfolk and magical beasts, she transitioned to overseeing logistics and supplies, establishing her as a key figure in the army's operational support systems. In battle, she harnesses the power to transform into Fenrir, a formidable wolf god form, underscoring her frontline combatant role when required.

Her relationships highlight loyalty to Demon Queen Echidna and her standing among the Elite Four. Interactions occur with fellow generals like Shutina and Mernes within their shared command structure. However, her most defining dynamic centers on Leo, whom she views as her fated partner following his combat victory over her, sustaining her unyielding devotion despite his consistent dismissals.