Pro | Owen | Michaels | Hannah's husband. |
| Hannah | Hall | Protagonist and Narrator. |
| | | Part 1 |
| Bailey | Michaels | Owen's daughter. Hannah's step-daughter. |
| Claire | | A friend of the 12-year-old girl. |
| Jack | Hall | Hannah's father. |
| Carole | Hall | Hannah's mother. |
| Gwendolyn | | Jack's assistant and mistress. |
| Avett | Thompson | The CEO of the tech firm. Hannah's client. |
| Belle | Thompson | Avett's wife. |
| Suz | | Bailey's friend. |
| Bobby | | Bailey's boyfriend. |
| Lynn | Williams | Bailey's acquaintance. |
| Mr. | Hahn | Hannah's neighbor. |
| Mrs. | Hahn | Mr. Hahn's wife. |
| Julia Alexandra | Nichols | Hannah's oldest friend. Aka: Jules. |
| Nash | Richards | Hannah's ex-boyfriend. |
| Max | | An investigative journalist at Chronicles. |
| Grady | Bradford | A U.S. Marshal. |
| Benj | | A waiter. |
| Thomas | Shelton | A family lawyer. Grady's friend. |
| Carl | Conrad | Owen's closest friend. A lawyer. |
| Patricia | Conrad | Carl's wife. Aka: Patty. |
| Sarah | Conrad | Carl and Patty's daughter. |
| LeAnn | Sullivan | Hannah's neighbor. |
| Olivia | Michaels | Bailey's mother. Owen's first wife. |
| L.Paul | | Owen's conservator. |
| Jeremy | O'Mackey | An FBI special agent. |
| Naomi | Wu | Jeremy's colleague. |
| Jake | Bradley-Anderson | Hannah's former fiancé. |
| Brian | Padura | The boy who asked Bailey if Owen is a criminal. |
| | | Part 2 |
| Amy | | A hotel receptionist. |
| Steve | | A desk clerk. |
| Elliott | | A tour guide. |
| Elenor | H. McGovern | The receptionist at Episcopal Church. |
| Cara | | Carl's co-worker and mistress. |
| Alex | | Jake's friend. |
| Waylon | | The man Owen and Hannah met. |
| Tobias | Cookman | Owen's professor. Aka: Cook. |
| Nielon | Simonson | The school registrar. |
| Cheryl | | The graduate student. Cook's assistant. |
| Scott | | Cook's assistant. |
| Rory | | Bailey's friend. |
| Jordan | Maverick | The COO at The Shop. Avery's assistant. |
| Max | | Jules's colleague. |
| Sophie | | A long-time parishioner. |
| Katherine | Smith | Owen's former classmate. Aka: Kate. |
| Charlie | Smith | Andrea's husband. Kate's brother. |
| Andrea | Reyes | Charlie's wife. |
| Meredith | Smith | Charlie and Kate's mother. |
| Daniel Nicholas | Bell | Charlie and Kate's father. Aka: The good lawyer. |
| Ethan | Young | Kate's husband. Owen's real name. |
| Kristin | | Etan and Kate's daughter. Bailey's real name. |
| | | Part 3 |
| Sylvia | Hernandez | A U.S. Marshal. Grady's colleague. |
| Ned | | Nicholas's guard. |
| Casper | | Nicholas's dog. |
| Leon | | Nicholas's dog. |
| Marcus | | One of Nicholas's guards. |
| Harris | Gray | Nicholas's former client. |