Who is primarily depicted as a spiritual influence in Dunny's life throughout the narrative?

Mary Dempster serves as the primary spiritual influence in Dunny's life throughout "Fifth Business." Her character embodies the concepts of saintliness and spirituality, providing Dunny with a profound connection to a deeper understanding of himself and the world around him. As a character who is often referred to as a "saint," Mary represents a form of wisdom and insight that guides Dunny on his journey of self-discovery.

Her influence is especially significant because it prompts Dunny to confront the complexities of his own identity and moral dilemmas. Throughout the novel, he grapples with feelings of guilt and responsibility, and Mary becomes a touchstone for him to explore these themes. The character’s blend of innocence and mystical qualities leads Dunny to ponder the nature of good and evil, helping him navigate the spiritual questions that pervade his life.

In contrast, while Liesl, Diana, and Leola each play important roles in Dunny's life, their influences are more worldly or centered around personal relationships rather than the spiritual guidance that Mary embodies. Thus, Mary Dempster stands out as the character who primarily shapes Dunny's spiritual journey.