Benjamín is the main protagonist of the anime. In the story's setting of Genoa, Italy, he is a twelve-year-old boy with a deep passion for football. Originally from France in most versions of the series, he is an orphan who has lost both parents. His remarkable talent for the sport was developed through constant practice, often training alone or with friends on the streets.

Benjamín's personality is defined by his dedication and love for football. He is portrayed as a promising young player who initially appears to be weak but has the potential to grow significantly with proper guidance. His journey in the story begins when Dr. Albert Robson, a former professional English player, notices his abilities and decides to take him under his wing as a coach and mentor. This relationship is key to his development as a player.

Throughout the series, Benjamín's role evolves as he progresses through different teams. He starts by playing for the team Columbus, then moves on to play for Genoa before eventually becoming a member and the captain of the Jupiter Wings, a team created specifically for young talented players. His primary motivation is to improve his football skills and succeed in the sport, a dream he pursues relentlessly. Another significant relationship in his life is with Catherine Townsend, who becomes his girlfriend.

Benjamín demonstrates notable football abilities that set him apart. He is known for a powerful and unique shooting technique referred to as the Eagle Shot. Under the tutelage of Dr. Robson, he undergoes a distinctive training regimen that focuses on developing his core athletic skills, such as being tasked with catching a chicken as part of his early training. As the series progresses, he goes from being a solitary street player to a confident captain and a key player on a competitive team, leading his squad against various rivals.