Luca is a devoted member of the Arcana Famiglia who serves as Felicità’s personal attendant, having been her caretaker since early childhood. He is 29 years old, stands 176 cm tall, and bears the mark of the Temperance arcana on his tongue. His background is closely tied to the organization: he grew up alongside Pace and Debito as childhood friends, and his alchemy teacher is Jolly, who is later revealed to be his father, though their relationship is strained due to Jolly’s past experiments. Luca is responsible, polite, and mature in his demeanor, speaking courteously to everyone he encounters. Beneath his calm exterior, he is deeply emotional and soft-hearted, and he becomes intensely protective of Felicità, often growing suspicious of anyone who tries to get close to her or spend time alone with her. His primary motivation is to safeguard Felicità and remain by her side, a duty he treats with absolute seriousness. In the story, he acts as her loyal attendant and confidant, supporting her during the events surrounding the Arcana Duello. He is also the one who taught Felicità how to use knives in combat, and his skill with blades is considerable. Beyond combat, Luca is intellectually inclined and passionate about alchemy, often spending his free time conducting experiments in his laboratory. He is also talented in domestic tasks such as cooking and sewing, and his lemon pie is considered exceptional by the other members. His key relationships include his childhood friends Pace and Debito, with whom he shares a long history, and his difficult bond with Jolly, which stems from the Tarocco Experiment. Luca’s development is shaped by his unwavering commitment to Felicità and his gradual reckoning with his past, including his father’s actions. His notable abilities include mastery of alchemy, proficiency with knives, and the power granted by his contract with the Temperance arcana.