Gianluca contracted a fatal illness in childhood, and even doctors abandoned him as a lost cause. When Passione saved his life, he and his father joined the gang. Although he has no Stand power, Gianluca is unflinchingly loyal to Passione. He accepts even his father's death as a natural result of their devotion to the syndicate. When Giorno reveals himself as the boss, Gianluca negotiates, unarmed and unaided, with the dissatisfied high-ranking members of the syndicate in order to preserve the stability of Passione. His conduct catches Giorno's attention, and he succeeds his father's position, directly under Passione's underboss Guido Mista.