Billie’s childhood friend and foil, Cassie is a social media influencer living in Manhattan, whose outward focus on wealth and status contrasts with her more nuanced personal relationships.

Billie’s mother who is a dental nurse and single parent, Lorraine experiences early-onset Alzheimer’s disease, which plays a significant role in shaping Billie’s past.

Billie’s stepfather and the antagonist in her early life, Wade’s presence creates conflict in Billie’s childhood home.

Cassie’s husband and a hedge fund manager from an affluent background, he illustrates her fixation on wealth and status through their marriage.

Billie’s boyfriend and a police officer, Alex is characterized by his lack of pretension and decency, which attract Billie to him despite her secretive tendencies.

Billie’s boss and friend at the travel agency The Path, Jane represents authenticity and serves as a voice of reason in Billie’s life.

Cassie’s aspirational role model and Grant’s cousin, McKay is a privileged woman who represents themes of class and social mobility.

Billie’s first boyfriend, Remy is an artist whose gentle nature and vulnerability contrast with the negative male influences in Billie’s life.

Cassie’s paternal grandmother from Greenwich, whose wealth and elitist values heavily influence Cassie's aspirations and views on social class.