Luccia Wayne possesses a youthful visage, her long sand-blonde hair and brown eyes frequently leading strangers to assume she is her son Al’s sister rather than his mother. She habitually dons a light olive shirt beneath a white apron, paired with a dark brown skirt and heeled shoes. Her fervent devotion to Al manifests in bone-crushing embraces, handwritten declarations of adoration, and razor-sharp jealousy toward anyone who threatens his romantic attention. Though affectionate, she harbors a fiery temper, particularly toward her husband Gilles, whom she physically reprimands for errors like mistakenly targeting Al during confrontations.

A former hero and Shadow Puppet captain, Luccia conceals her tactical expertise and combat-honed reflexes beneath a veneer of domesticity. Her strategic mind surfaces when exposing external threats, such as unraveling Antisburg’s plot to manipulate a demon via hostage coercion against Meigis. Despite masking her past from Al, her investigative precision emerges in missions like tracing the origins of the enigmatic sword Laevateinn to neutralize dangers circling her family.

Luccia and Gilles share a bond laced with clashing jealousies—he bristles at men near her, while she sabotages women close to Al—yet their mutual loyalty persists. She oscillates between calling Gilles "dear" and disciplining him with calculated strikes, enforcing boundaries without eroding their partnership. Prioritizing Al’s safety above all, she leverages her intelligence network and martial prowess to dismantle risks, often while maintaining the rhythm of daily life. Her mastery of household tasks, from cooking to meticulous chores, further obscures her secret legacy, leaving Al initially oblivious to the warrior beneath the apron.