The youngest adopted son of Bernard Doyle, Teddy is characterized by his gentle nature and indecision about his future, initially contemplating a religious vocation. His journey involves finding his path through personal and familial challenges.

Bernard Doyle's older adopted son, Tip is a serious and academically driven senior at Harvard studying ichthyology. His perspective on family and privilege evolves throughout the novel.

An independent and talented young runner, Kenya becomes integral to the Doyle family after a pivotal event at the novel's outset. Her resilience and empathy are key catalysts for change within the family.

Bernard's eldest and only biological son, Sullivan is a complex character who grapples with feelings of alienation from his family. His past actions and strained relationships add depth to the story's exploration of redemption.