Ruby Benoit is the protagonist of The Room on Rue Amélie. She begins as a naïve, idealistic student caught up in a whirlwind romance and progresses to a strong, maternal Resistance warrior. As an American living in Europe, Ruby carries her American perspective and mannerisms with her, which initially causes some problems for her when she has to adjust to her new surroundings as an immigrant in France. When she first meets Charlotte, they form a close friendship based on their shared sense of alienation—a bond that will later become deeply important to both of them as the war progresses.

Ruby’s life changes when she discovers her husband’s hidden work in the Resistance movement. While Marcel’s long absences and reluctance to accept Ruby’s involvement strain their marriage, the Resistance shows Ruby a world and a purpose bigger than herself. The Resistance helps her rediscover and restore her personal identity, and following Marcel’s death, Ruby continues his work to prove to herself that she is strong and independent. Her work also leads her to a new, deeper romance. Her brief relationship with Thomas allows her to live in the present moment and to appreciate the value of human connection.