Helen is a significant character whose narrative perspective dominates the second half of the novel and is initially known to Rosie through letters. She is an unmarried, independent woman who has a strong desire to improve the world and help those around her.

Truman is a caretaker of a vineyard and is characterized as a quiet, reserved man who defers to his wife in many matters. He is depicted as a large man with a battle injury from the Great War and plays a complex role in Rosanne's life.

Celine is a tertiary character known for her active and pragmatic nature and is less personally invested in Rosanne's well-being than her sister-in-law, Helen. She agrees to take Rosanne into her home but remains emotionally distant from her.