Caro's younger sister, Grace, is noted for her beauty and self-assurance. She initially lives a conventional domestic life with her husband, Christian, but later seeks to connect with her roots and rediscover her passions.

The half-sister who raises Caro and Grace after their parents' death, Dora is characterized by her resentment and dependency. Her complex relationship with Caro adds a layer of familial tension to the narrative.

An English astronomer of working-class origins, Ted becomes entwined with the Bell sisters' lives. His character is marked by intelligence, complexity, and steadfast devotion.

A charming and artistic Englishman, Paul engages in a secretive and complex personal life. His relationships often blur the lines between genuine connection and calculated pursuit.

Grace's husband and a British government official, Christian's background is rooted in social status and tradition. His interest in the Bell sisters is both an attraction and a threat to his ordered life.

Christian's mother, who adheres to Victorian customs, is a sharp observer of those around her. Her story reflects themes of transition and loss of status.

A professor nearing the end of his career, Sefton is portrayed as nostalgic for a bygone era. He struggles with feelings of irrelevance in a changing social landscape.

An American businessman and Caro's husband, Adam is involved in human rights efforts. While confident and direct, he occasionally struggles to understand Caro's romantic nature.

Paul's aristocratic wife, Tertia exemplifies British nobility's characteristics. Her outward appearance masks a deeper awareness of her husband's personal complexities.

Ted's wife and a mother with keen intelligence and sensitivity, Margaret embodies beauty and grace but faces personal heartache within her marriage. Her situation hints at themes of love and independence.