Roberto De Zerbi's formative years were spent immersed in the passionate, often volatile, atmosphere of the Brescia football club's curva, a sentiment he describes as being born an "ultra." This upbringing, alongside his father, Alfredo, has profoundly shaped his coaching ethos, instilling a strong sense of solidarity and a connection to working-class roots that he carries with him.

Alfredo De Zerbi was a prominent figure within the Brescia supporters' clubs, meticulously organizing away trips and player engagements. His passion for the game was matched by a fiery but gentle personality, characterized by a willingness to speak his mind. Rosanna Pedrollo, who worked for Brescia for half a century, recalls Alfredo as a vital presence, deeply involved in the club's fan culture.

Young Roberto, known to friends as 'Roby,' was a fixture at matches and training sessions from a young age, even serving as a mascot and preparing tifos. His own football talent emerged as he played for local sides before joining AC Milan at 12. His father harbored a strong desire to see his son play for their hometown club, a wish fulfilled when De Zerbi had a 19-game loan spell at Brescia in 2008.

De Zerbi's early coaching experiences also began in Brescia, assisting a friend with youth teams. However, the core principles that guide his management today were forged through significant family adversity during the economic crisis of the early 1990s. His father was compelled to sell their mat factory and their family home, forcing the De Zerbi family to rebuild their lives from modest accommodations.

This period of hardship left an indelible mark on De Zerbi. He has spoken of how, shortly after signing his first professional contract with AC Milan, he secured a mortgage to buy his parents a new home. This act reflects a commitment to his family and his origins, demonstrating that success has not led him to abandon his values.

Journalist Lamrani, who has worked closely with De Zerbi, notes his enduring connection to his youth and working-class background. Lamrani states that De Zerbi maintains the principles of solidarity and generosity instilled by his parents, never distancing himself from his social origins. He is described as someone who instinctively sides with the oppressed, a trait forged by his personal life experiences and contributing to a rebellious temperament.