Julia is a 56-year-old part-time librarian living in a Chicago suburb. Raised in a working-class home by a single mother, she often feels alienated from the comfortable, wealthy lifestyle she now inhabits. She is fiercely devoted to her children but wrestles with self-doubt and internal conflicts regarding her identity as a mother and wife.

Mark is a research scientist working for a venture capital firm. Coming from a stable, loving family in Wisconsin, his upbringing strongly contrasts with Julia's turbulent childhood. He is an active father and a steady presence in his family's life, though he occasionally struggles to fully grasp his wife's internal struggles.

Anita is Julia's mother, who worked as a cashier while raising her daughter in Chicago. Overwhelmed by the demands of single motherhood, her early parenting was often harsh and erratic. Decades later, she lives a more stable life, attempting to build a guarded connection with her adult daughter.

Helen is Julia's former best friend, a retired lawyer roughly twenty years her senior. Confident, wealthy, and steady, she once served as an idealized model of motherhood and suburban grace for a younger Julia. She is welcoming and magnanimous, though her seemingly perfect life contains its own quiet loneliness.

Ben is Julia and Mark's 24-year-old firstborn child. Sweet-natured and academically inclined, he possesses a curiosity about the world that mirrors his father's scientific bent. As he prepares to enter marriage and fatherhood, his decisions introduce new dynamics into the family.

Alma is Julia and Mark's 17-year-old daughter. She is a spunky, creative teen who is passionate about social justice and environmental causes. While she frequently displays typical teenage friction with her mother, she also possesses a keen understanding of her family's history.

Sunny is Ben's 24-year-old fiancée. She is studying contemporary Baroque painting and describes herself as highly organized. Dealing with a strained relationship with her own family due to past tragedies, she finds herself managing the overwhelming logistics of pregnancy and wedding planning.

Nathaniel is Helen's youngest son, introduced in the past timeline as a 28-year-old aspiring writer. He holds complex, sometimes resentful views of his mother's career-driven life and forms an intense, secretive connection with Julia during a vulnerable period in her marriage.

Brady is Mark's wealthy best friend and a venture capital firm executive. Having known Mark since childhood, Brady lives an affluent, highly visible suburban lifestyle. Despite his financial success, he struggles with personal insecurities and domestic turbulence.

Francine is Brady's wife, a woman who initially represents the epitome of wealthy suburban motherhood. To Julia, she seems robust, confident, and intimidatingly put-together. Over the years, her seemingly pristine domestic life reveals its own fractures.

Lawrence is Julia's absent father. He left the family home when Julia was a child following bitter arguments with Anita. His departure profoundly shaped Julia's worldview, teaching her early lessons about abandonment and self-reliance.

Pete is Helen's husband. Unlike traditional mid-century domestic setups, Pete stayed home to raise their five sons while his wife built a career in law. He is a hands-on, capable figure who radiates a sense of comfortable domestic happiness.

Marshall is a public defender who arrives in Chicago alongside Anita. He is a steady, supportive presence in her life, demonstrating patience and a desire to build bridges between Anita and her estranged family members.

Jonathan is Anita's former boyfriend from when Julia was seventeen. While he initially seems like a positive influence who brings art and music into the household, his presence ultimately causes deep rifts in the family dynamic.