Owen is the enigmatic central figure of the novel, motivated primarily by his love for his daughter, Bailey. Known for his intelligence and loyalty, he has a past that is shrouded in mystery and disputed events. Owen is portrayed through Hannah's memories and others' accounts, which question his integrity. He vanishes, leaving behind resources for Bailey and instructing Hannah to protect her.

Bailey starts as a typical 16-year-old, dismissive of her stepmother, Hannah. An avid theater enthusiast with an older boyfriend, she struggles with Hannah's presence. Following her father's disappearance, Bailey matures and collaborates with Hannah to unravel the mystery. Her relationship with Hannah evolves from conflict to a supportive, loving bond.

Bell is a key figure whose actions set the events in motion, appearing as the story nears its resolution. Originally a defense lawyer, he becomes involved with a crime syndicate, leading to wealth and complex relationships. He has a strained relationship with Owen but also cares deeply for him. Bell's complexities and desire for a relationship with his granddaughter, Bailey, are eventually acknowledged by Hannah.