The novel’s complex antagonist who suffers from Huntington's Disease, leading to unpredictable behavior. He becomes fixated on Henry following a minor car accident.

Henry's daughter, an intelligent and independent young woman with a passion for poetry. She is encouraged by her grandfather and has secured a book deal.

Henry’s wife, a dedicated lawyer who balances her career with nurturing her family. She supports Henry, showing strength and resilience during the novel's tense moments.

Henry’s 18-year-old son, a free spirit who is passionate about music, particularly blues guitar. He is influenced by his grandfather and shares a youthful, artistic energy.

Henry’s father-in-law, a renowned poet who impacts his grandchildren’s lives. He is characterized by his intellectual prowess but struggles with alcohol misuse.