A character whose recollections of his childhood in the Chelsea mansion offer glimpses into the dark past of the Lamb family and their association with other complex figures.

A 40-year-old homeless woman struggling to survive in the Côte d’Azur with her children and dog, who has deep ties to the history of the Chelsea mansion and its longtime residents.

The husband of Sally Thomsen and father of Phin and Clemency, known for his charismatic yet controlling presence in the lives of those living in the Chelsea mansion.

A fiddle player whose arrival at the Chelsea house in 1988 signals a shift in the household dynamic as she becomes involved with the lives of the residents.

The son of David and Sally Thomsen, who shares a complex history with the Lamb family and plays a significant role in the events surrounding the Chelsea mansion.

Wife of Henry Lamb and mother of Henry (Junior) and Lucy, who becomes entangled in the lives and influences of new arrivals at the Chelsea mansion.

Husband of Martina Lamb, whose declining health leads to significant changes in the dynamics of the Chelsea mansion household.

Arrives with Birdie as her partner at the Chelsea mansion, known for his interest in herbal remedies and gardening.

David Thomsen's estranged wife and the mother of Phin and Clemency, who distances herself from the events at the Chelsea mansion.

Daughter of David and Sally, and sister to Phin, who shares a complicated past with the residents of the Chelsea mansion during her teenage years.

A journalist who previously wrote about the Chelsea mansion and its mysteries, eventually helping Libby uncover her past.