Genzou Wakabayashi, known as Benji Price in various international adaptations, is a central figure in the Captain Tsubasa story, recognized as one of the most talented and formidable goalkeepers of his generation. He is born into a wealthy and influential family in Nankatsu, Japan, on December 7th, which positions him as a character of privilege from the outset. However, his status is not merely a matter of birth; from a very young age, he undergoes a rigorous and personal training regimen under the guidance of his private coach, Tatsuo Mikami. This intensive, almost solitary training takes place on a dedicated field within his family’s large estate, forging his exceptional skills but also contributing to his initially isolated and supremely self-assured demeanor.

In his early appearances, Wakabayashi is defined by an almost unshakable confidence that borders on arrogance. As the captain and star goalkeeper for the Shutetsu team, his reputation as an invincible guardian of the goal precedes him. He carries himself with a natural, commanding presence and a deep-seated pride in his abilities, considering the idea of being scored upon as a personal failure. His sole, burning ambition is to become the best goalkeeper in the entire world, a goal he pursues with single-minded intensity. This rigid and self-centered worldview is fundamentally challenged by his first encounter with Tsubasa Ozora, a boy who shares his passion for football but expresses it through a joyful, inventive, and almost reckless style of play.

The rivalry that sparks between Wakabayashi and Tsubasa becomes the primary catalyst for his character development. The moment Tsubasa scores a goal against him, breaking his aura of invincibility, is a profound shock that initially fuels his anger and wounded pride. Yet, this defeat sows the seeds of a deep, mutual respect that quickly transforms their rivalry into a powerful friendship and a formidable partnership on the field. This relationship teaches him the value of teamwork and shared passion, maturing him from a solitary prodigy into a dedicated and driven, albeit still intense, teammate. While he remains fiercely competitive, stubborn, and at times brusque, his actions are increasingly motivated by a desire to push his friends and national team to higher standards. He often hides his genuine, caring intentions behind a harsh exterior, famously playing the role of a cold critic during a national team training camp to spur his fellow players into recognizing the gap between Japanese and European football, a calculated performance he only reveals to Tsubasa.

Driven by his ambition to face the world's best, Wakabayashi makes the pivotal decision to move to West Germany at the age of twelve. There, he joins the youth ranks of the Hamburg SV, a move that exposes him to a far more rigorous and physically demanding style of football. His early days in Germany are marked by prejudice from teammates who underestimate him due to his nationality, but he quickly earns their respect through his unwavering work ethic and spectacular saves. It is in Germany that he meets and forges his greatest international rival, the powerful striker Karl-Heinz Schneider, known as the Emperor. Their battles, where the unstoppable shot meets the immovable goalkeeper, become a benchmark for top-level European football and further define Wakabayashi's identity as the S.G.G.K., or Super Great Goalkeeper. This moniker, which he earns early on, is a testament to his reputation for being nearly impossible to score against, particularly from outside the penalty area.

Throughout the story, Wakabayashi is the last line of defense and a vocal leader for the Japanese national team, from its youth levels to its senior squads. His role is often that of the anchor, providing a sense of security that allows the team's creative attackers to flourish. His key relationships extend beyond Tsubasa and Schneider. He shares a particularly intense and competitive dynamic with Ken Wakashimazu, the karate-ka goalkeeper, as they constantly challenge one another for the number one spot on the national team, with Wakabayashi’s orthodox power and positioning contrasting sharply with Wakashimazu’s acrobatic, martial arts-inspired style. He also has a volatile rivalry with the powerful striker Kojiro Hyuga, which once erupted into a physical fight after Wakabayashi harshly criticized Hyuga’s leadership. Other formidable foes, like the Swedish midfielder Stefan Levin and the Dutch playmaker Brian Cruyfford, are also known for pushing him to his physical limits, often leaving him with severe hand injuries from blocking their devastating shots.

Wakabayashi’s abilities are as notable as his personality. His most celebrated trait is his incredible reflexes and concentration, allowing him to make seemingly impossible saves. He possesses immense physical strength, frequently catching powerful, swerving shots cleanly rather than merely deflecting them. His positional sense and ability to read the game are exceptional, enabling him to organize his defense with authority. Throughout the series, he repeatedly demonstrates a nearly superhuman will to win, often continuing to play through serious injuries to his hands, back, or even an eye, putting his long-term health on the line for the sake of his team. While his early dream was purely individual glory, his development shows him embracing a more holistic vision of success, one where his legendary goalkeeping becomes the unbreakable foundation upon which his friends and teammates can build their own dreams of world conquest.