The Father of Dino is formally known as the Cavallone Nono, having served as the ninth boss of the Cavallone Famiglia. Physically, he is shown with pale skin and an angular face, and in his final moments, he is depicted in a plain white shirt on his deathbed. As the head of the Cavallone family, his tenure was marked by declining fortunes, as the organization had fallen from its former standing by the time of his illness. He was also a widower, having raised his son Dino alone after the boy's mother died early in Dino's life.

His primary role in the narrative is that of a catalyst for his son's development, appearing exclusively in flashbacks. Aware that his health was failing, he became determined to secure the future of his family by ensuring his reluctant son would succeed him as the tenth boss. Recognizing Dino's initial refusal and lack of readiness, the Cavallone Nono arranged for the world's greatest hitman, Reborn, to become Dino's home tutor, a final request that was made on his deathbed.

Regarding his personality, motivations, and character development, there is no information. His role is strictly functional, existing to establish Dino's backstory and the circumstances that forced Dino to accept his destiny as a mafia boss. Similarly, there is no information on any notable abilities he may have possessed. While he arranged for Dino to attend a school for mafia children and was ultimately shot by a rival famiglia, the Irregolare Famiglia, no details about his own combat skills or leadership style are provided. His key relationships, therefore, are defined entirely by his concern for his son and his trust in his subordinate Romario, to whom he expressed his final wishes. The entirety of his impact on the story is felt through his absence, as his death and dying wish set his son on the path to becoming the capable boss known as "Bucking Horse Dino".