Mondo is the head of the Arcana Famiglia and the father of the protagonist Felicità. He is a tall man with chin-length auburn hair that is slicked back, a beard, green eyes, and several stud earrings in both ears. He typically dresses in a gray shirt with a white vest and a white coat. As the leader of the powerful organization that protects the island of Regalo, Mondo holds the title of Papa and commands deep respect from all members. He bears the Arcana of Il Mondo, the World card, which grants him the ability to seal the powers of other Arcana users or enhance them. Despite his imposing and authoritative demeanor, Mondo possesses a caring and kind nature beneath his strict exterior. He is willing to sacrifice his own life to protect those he holds dear, though he often acts in an eccentric and impulsive manner. His motivations center on securing the future of the Arcana Famiglia and his daughter. Recognizing his advancing age and declining health, Mondo decides to retire and initiates the Arcana Duello, a tournament among Arcana users to determine his successor. He promises the winner not only the title of Papa and any wish of their choice, but also Felicità's hand in marriage, a decision that drives much of the story's conflict. This action reveals his layered personality: he can be harsh and unyielding in his methods, yet he ultimately acts out of a sense of responsibility for the family he leads and a desire to see his legacy continue. Mondo's role in the narrative is that of a catalyst who sets the central tournament in motion, serving as a supporting figure whose decisions shape the paths of the main characters. His key relationship is with Felicità, his only daughter, whom he loves but also treats with a firm hand that pushes her to fight for her own future. He is also the grandfather of Libertà, one of the main characters, which adds a familial layer to the story's dynamics. Notable abilities center on his Arcana power, Il Mondo, which allows him to control and regulate the powers of other contracted individuals, making him a formidable overseer of the Famiglia. Mondo's development is subtle, as he remains largely a figure of authority throughout the series, but his retirement reveal and the ensuing events prompt him to confront the consequences of his decisions and the changing nature of his role.