Helen’s husband, an architect who is admired for his apparent dedication to their marriage despite past challenges, and is perceived as a loving partner.

Helen’s older brother and Daniel’s business partner, an architect who shares her upper-class lifestyle and is depicted as smart and responsible.

Rory’s wife and Helen’s sister-in-law, an upper-class socialite and photographer admired by Helen for her taste and lifestyle.

A new friend to Helen she meets at a prenatal class, who presents as an unconventional character that challenges Helen's preconceived notions.

A childhood friend of Helen and journalist, known for her intelligence and determination, who plays a significant role in uncovering the novel’s mysteries.

Helen’s younger brother, a DJ living a contrasting lifestyle to his siblings, initially perceived by Helen as irresponsible but shown to have a strong familial bond.