Liselotte Homuros, third princess of the Homuross Kingdom, is the daughter of the king and a Gurumak Empire princess, her lineage binding two rival nations in fragile diplomacy. This dual heritage marks her as both a strategic asset and a target for assassins aiming to sever the alliance. A mysterious slow-acting curse condemns her to gradual starvation until Kurt Rockhans unwittingly dispels it by serving her rice porridge at Ophilia’s workshop—an act that saves her life and ignites her unwavering devotion.

Rescued and infatuated, she fixates on Kurt as her hero, her affection laced with possessive jealousy toward rivals. Though royalty, she rejects formalities, embracing ordinary life alongside Kurt, Yulicia, and Akuri—a cryptic child attached to Kurt. Together, they forge an improvised family, sharing guardianship of Akuri while navigating covert responsibilities.

Her royal identity remains hidden from Kurt for protection. She wields "Butterfly," a magical short sword he forged, summoning Rikuto—a lifelike illusion modeled after her vision of a twenty-year-old Kurt. Rikuto acts as the public facade for their atelier, his true nature known only to Lieselotte, Yulicia, and Mimico.

Previously sheltered under Atelier Master Ophilia, she evolves from a guarded royal into a proactive agent, blending spellcraft and political acumen during clandestine missions. Her bond with Kurt unveils a mischievous, fiercely loyal spirit, driving inventive schemes to remain near him even as external dangers loom—a blend of playful charm and unyielding resolve.