Luca (ルカ Ruka) Luca is a former St. Albion prostitute and refugee who currently runs an inn in Falconia. Though not much of Luca's past has been revealed, it is known that her home was burned down in the late stages of the Hundred Year War, necessitating that she, like hundreds of other inhabitants of Midland, make her way to St. Albion as a refugee. While making her way there, Luca met, befriended, and took a protective role over an insane Casca, along with four other girls: Nina, Pepe, Fouquet and Lucie. Under Luca's instruction, the latter four girls became prostitutes, allowing Luca to ensure their survival during their sojourn in St. Albion.
Luca is a young woman of average height who is often noted to be attractive. She has long brown hair that she parts down the middle, though she often allows a single lock of it to fall across her face and to one side of her nose. While is St. Albion, she was most usually seen in a simple blue and white apron dress, but upon becoming an inn owner she has updated her wardrobe for a more regal-looking dress that is similar to her initial outfit.
Luca is a kindhearted and playful person who, due to the positions and environments that she places and finds herself in, is forced to put on a serious air to the benefit of both herself those around her. She acts as a mother figure toward her four protégées - Pepe, Fouquet, Lucie, and especially Nina, to all of whom Luca displays a 'tough love'-type mentality by requiring them to work as prostitutes while under her care in exchange for ensuring their survival and providing them with genuine affection. In addition to this, Luca is also protective of Casca, whom she met while on her way to St. Albion and took under her wing, knowing that the demented girl could hardly fend for herself. When Luca's affection for those under her protection was put to the test, she was willing to sacrifice her life to give them a chance at survival. In less bleak situations, Luca tends to show her more lighthearted side.
In addition to this is Luca's penchant for skepticism. Through her interactions with Jerome and Guts, she displayed an unwillingness to take people's words as absolute truth, and she required physical proof of both of their claims (Jerome's devotion to her, for which he risked his life and career; and Guts' being familiar with Casca, proven in that he knew her real name and bore the same mark on his neck that she had on her chest) before they fully earned her trust.
Among Luca's other notable traits are her sensitivity to other people's personal hardships, which allowed her to empathize with both Nina and the Egg-Shaped Apostle, and her imaginativeness, which humorously led her to mistake the Skull Knight for Death during their encounter due to his skeletal appearance.
In general, Luca has proven herself to be quite socially and politically savvy despite her presumably commoner origins. It was through her machinations that herself, Nina, Pepe, Fouquet, Lucie and Casca could live in the slums of St. Albion in relative comfort while those in the tents around them succumbed to the plague and starvation. Even possible repercussions of this were avoided thanks to Luca's foresight: she instructed her protégées to distribute the riches they earned or were gifted by their clients to their slum neighbors to prevent any bad blood, thereby avoiding that Luca and her group's wealth be reported to the Holy See by envious neighbors.