John's wife, who is intelligent and idealistic, maintains an enigmatic presence throughout the story as she navigates her relationship filled with secrets and independence.

Kathy's sister, who serves as a critical voice and remains skeptical of John, reflecting concern over Kathy's life choices and disappearance.

A politically savvy campaign manager who understands John's true character and harbors unrequited feelings for Kathy, providing a realistic perspective on John.

A wealthy businessman and supportive figure in John's life, offering refuge and paternal acceptance that helps John cope with his personal crises.

A fellow soldier during the Vietnam War who represents the moral conscience of the story, highlighting the atrocities of war while retaining compassion and humanity.