James Lee: Lydia’s father, a Chinese-American professor of history who teaches a course on the American cowboy. He’s shaped by a lifetime of feeling like an outsider and wants his children to blend seamlessly into American society.

Marilyn Lee: Lydia’s mother, a white American woman who once dreamed of becoming a doctor but gave up her aspirations after marriage and motherhood. She pours her thwarted ambitions into Lydia, hoping she’ll achieve what she couldn’t.

Nath Lee (Nathan): Lydia’s older brother, a quiet and observant teenager who’s often overlooked by his parents. He’s passionate about space and headed to Harvard, but he’s also deeply affected by Lydia’s death and his complex relationship with her.

Hannah Lee: The youngest Lee sibling, a shy and perceptive child who tends to fade into the background. She notices more than anyone realizes and holds quiet insights into the family’s dynamics.

Jack Wolff: The Lees’ neighbor, a rebellious teenager with a reputation for trouble. He’s a friend—or perhaps something more—to Lydia, and his connection to her becomes a point of suspicion after her death.