Ciocci serves as a professional cyclist and key member of the Pao Pao Beer racing team, holding the position of their second-best rider. He competes alongside protagonist Pepe Benengeli in the Vuelta a España. During the race through Andalusia, significant fatigue compromises Ciocci's performance. This physical struggle directly impacts team dynamics, prompting Pepe to assume a more prominent strategic role.

Years later, during events chronicled in the sequel "Nasu: A Migratory Bird with Suitcase," Ciocci confronts a profound personal and professional crisis. He grapples with intense existential doubts regarding his cycling career, questioning the sacrifices demanded to maintain peak athletic condition—strict diets, rigorous training, and postponed family life. These mounting uncertainties trigger a decline in his competitive results, creating a destructive cycle where poor performance further erodes his confidence.

Compounding this crisis, Ciocci becomes preoccupied with the concept of innate cycling greatness following the suicide of legendary cyclist Marco Rondanini. He fixates on the idea that transcendent cyclists possess an indefinable, almost divine quality—a "je ne sais quoi"—he believes he inherently lacks. This conviction deepens his despair and fuels his belief that he can never achieve true greatness.

The potential disbandment of the Pao Pao Beer team due to prolonged poor results intensifies Ciocci's struggles, contributing to overall team demoralization during a critical race in Japan. However, a pivotal moment occurs when Pepe sacrifices his own position after a crash to support Ciocci. This act enables Ciocci to secure a race victory. Achieving first place revitalizes his self-belief, breaks his cycle of doubt, and helps stabilize the team's future prospects.