Lucia of End stands among three sisters from the underworld, alongside Patricia and Euracia. She holds the position of the older sister within the End family, where her mother reigns as queen over the underworld realm. This royal status in the afterlife dimension grants Lucia specific responsibilities tied to her family's position. Her personality presents a strict exterior, yet she demonstrates clear indulgence toward her younger sisters, revealing a protective and nurturing aspect beneath her authoritative demeanor. Her interactions suggest a balance between her familial duties and her sisters' needs, though specific examples of this dynamic remain undefined. In appearance, she possesses blonde or yellow hair styled to ear length and distinct red eyes, with her design indicating a teenage portrayal. Her background remains anchored to her origins as a member of the underworld royalty, without elaboration on individual story arcs, conflicts, or personal development. No significant evolution of her role, relationships, or journey occurs across documented sequels, spin-offs, or adaptations beyond her initial presentation as part of the core family unit.