| Mr. | Atkinson | Works at Alistair's former office in Boston. |
| Wesley | Brill | Anna's former business partner. |
| Julian | Fielding | Anna's Psychiatrist. |
| Anna | Fox | Narrator. Child Psychologist. |
| Ed | Fox | Narrator's husband. |
| Olivia | Fox | Narrator's daughter. aka Livvy. |
| Christine | Gray | Anna's neighbor. |
| Elizabeth | Hughes | Alibi of David. |
| Conrad | Little | NYPD Detective. |
| Bert | Lord | Anna's former neighbor. |
| Josie | Lord | Bert's wife. |
| John | Miller | Psychotherapist. Neighbor of the narrator. |
| Sue | Miller | John's wife. aka Rita. |
| Mr. | Mott | Neighbor of the narrator. |
| Mrs. | Mott | Wife of Mr. Mott. |
| Val | Norelli | Detective. Conrad Little's partner. |
| Alistair | Russell | Anna's new neighbor. |
| Ethan | Russell | Teenage son of Alistair and Jane. |
| Jane | Russell | Alistair's wife. |
| Mr. | Takeda | Japanese. Anna's neighbor. |
| Mrs. | Takeda | American. Wife of Mr. Takeda. |
| Nick | Takeda | Son of Mr. and Mrs. Takeda. |
| Henry | Wasserman | Anna's neighbor. Long time residents. |
| Lisa | Wasserman | Henry's wife. |
| David | Winters | Anna's tenant. |
| Alex | | Alistair's former assistant in Boston. |
| Andrew | | Agoraphobia website (Agora) user. |
| Anne Marie | | 12 years old. Afraid of the dark. Anna's former patient. |
| Ava | | Anna's former patient. |
| Beau | | Lizzie's son. |
| Ben | | Anna's former patient. |
| Bina | | Anna's physical therapist. |
| Emily | | 9 years old. Anna's former patient. |
| Grace | | Anna's former patient. |
| Jennifer | | Wife of Allister former boss. |
| Joy | | 10 years old. Preternaturally depressed. Anna's former patient. |
| Justin | | 8 years old. His twin died of melanoma. Anna's former patient. |
| Katherine | | Acquaintance of David. Aka Katie. |
| Lizzie | | Agoraphobia website (Agora) user. aka GRANNYLIZZIE. |
| Marie | | Receptionist at Two Pine. |
| Mary | | 9 years old. Anna's former patient. |
| Mitzi | | Lawyer from Manchester. Agoraphobia website (Agora) user. |
| Pam | | Tattooed miracle worker. |
| Pedro | | Bolivian. Agoraphobia website (Agora) user. |
| Phil | | From Boston. Agoraphobia website (Agora) user. |
| Phoebe | | Wesley's receptionist. |
| Punch | | Narrator's cat. |
| Rasheed | | 11 years old. Transgender. Anna's former patient. |
| Richard | | Lizzie's husband. Teacher and Methodist deacon. Deceased. |
| Richard | | Anna's father. Deceased. |
| Sally | | Based in Perth. Agoraphobia website (Agora) user. |
| Sam | | Lizzie's former student. |
| Talia | | From Bay Area. Agoraphobia website (Agora) user. |
| Theo | | Anna's former patient. |
| William | | Lizzie's son. |
| Yves | | Anna's French tutor. |
