What was the description of the keeper in Keeper by Mal Peet?

In "Keeper" by Mal Peet, the keeper is depicted as a mysterious and authoritative figure who oversees the world of soccer and its players. He embodies a sense of wisdom and depth, often revealing profound insights about life, sport, and the human condition. The keeper's character serves as a crucial link between the protagonist and the larger themes of the story, emphasizing the complexities of ambition and identity. His presence adds a layer of intrigue and guidance as the narrative unfolds.