A secondary protagonist and first-person narrator who provides an American perspective, Lizzie is a strong, independent woman from rural Texas who forms a practical partnership in marriage while maintaining her loyalties to her family.

Sofie’s husband and a rocket scientist whose expertise secures him a place in Nazi politics and eventually in the US government, Jürgen's character is loosely inspired by the historical figure Wernher von Braun.

Lizzie's brother, whose experiences and mental health struggles following WWII trauma significantly influence Lizzie's actions throughout the novel.

Sofie’s childhood best friend, Mayim represents the impact of Nazi policies on Jewish families as her life is tragically altered by the regime’s actions.

Jürgen’s great-aunt, who provides shelter and support to Sofie, playing a crucial role in offering emotional and practical aid during difficult times in Nazi Germany.