| 1 | | Naylor | (Mr.) Mathematics Teacher of Louisa. |
| | Louisa E. | Clark | Narrator. Protagonist. |
| | Will | Traynor | Louisa's ex-boyfriend. Deceased. |
| | Nathan | | Louisa's friend. |
| | Leonard | Gopnik | Mr. G. Louisa's employer. |
| | Sam | Fielding | Louisa's boyfriend. Paramedic. |
| | Treena | Clark | Louisa's sister. Real name Katrina. |
| | Thom | | Louisa's nephew. Treena's son. |
| | Ashok | | Porter at the Lavery where Leonard and Agnes resides. |
| | Agnes | Gopnik | Leonard's wife. aka Mrs. G. |
| | Ilaria | | Leonard and Agnes' Housekeeper. |
| 2 | Margot | De Witt | Resident of Lavery. |
| | Mr. | Ovitz | Managing Agent of Lavery. |
| | Dean Martin | | Pug. Dog of Margot. |
| | Tabitha | Gopnik | Leonard's daughter. aka Tab. |
| 3 | George | | Agnes' trainer. |
| | Patrick | | Louisa's ex-boyfriend. |
| | Michael | | Leonard's assistant. |
| | Garry | | Agnes' driver. |
| | Donna | | Former co-worker and partner of Sam. |
| 4 | Lily | Traynor | Will's daughter. |
| 5 | Joshua William | Ryan, III | Works for Securities Firm. Will Traynor's look-alike.
Aka Josh. |
| | Kathryn | Gopnik | Former Mrs. Gopnik. |
| 6 | Paula | | Agnes' best friend. |
| | André | | Former masseuse of Leonard. |
| | Jake | | Sam's nephew. |
| 7 | Camilla | Traynor | Will's mother. |
| 8 | Katie | Ingram | Sam's new partner. |
| 9 | Steven | Lipkott | Painter/artist. |
| 10 | Bernard | Clark | Louisa's father. |
| 11 | Randy | | Works at Grand Pines Country Club. |
| | Mary | Lander | Assistant House Manager at Grand Pines Country Club. Retiring. |
| | Emmett | Henry | Member of Grand Pines Country Club. Lawyer. |
| | Dora | Henry | Emmett's wife. |
| | Libby | | Dora's nurse. |
| | Dean | | Gym buddy of Nathan. |
| | Arun | | Gym buddy of Nathan. |
| 12 | Lydia | | Cashier and co-owner of Vintage Clothes Emporium. |
| | Angelica | | Lydia's sister and co-owner of Vintage Clothes Emporium. |
| 13 | Zeinah | | Mother of the Syrian refugees that Louisa's mother is teaching English. |
| | Dymphna | | Neighbor of Louisa's parents. |
| | Maria | | Hotel Toilet Attendant. Acquaintance of Louisa's mother. |
| | | Edwards | (Mrs.) Neighbor of Louisa's parents . |
| | Nadia | | Youngest child of Ashok. |
| | Abhik | | Ashok's son. |
| | Rachana | | Eldest child of Ashok. |
| | Meena | | Ashok's wife. |
| | Eddie | | Treena's supposed boyfriend. |
| 16 | Veronica | Gopnik | Wife of Leonard's brother. |
| 18 | Andrew | | Neighbor of Louisa's parents. |
| | | Kemp | (Mrs.) Neighbor of Louisa's parents. |
| | Ronnie | | Neighbor of Louisa's parents. |
| | Marjorie | | Member of the club that Louisa's parents previously belongs. |
| | Josie | Clark | Louisa's mother. |
| 19 | Tanya H. | Miller | Lily's mother. |
| | Steven | Traynor | Will's father. |
| | Delia | Traynor | Steven's wife. |
| 20 | Zofia | | Agnes' daughter. |
| 21 | Tim | | Josh's cousin. |
| 23 | Frank | Aldridge | Margot's former boss. |
| | Terrence | Weber | Margot's husband. Deceased. |
| | Frank | Weber Jr. | Margot's son. Dentist. |
| 25 | Laynie | Weber | Wife of Frank Weber Jr. |
| | Vincent | Weber | aka Vinny. Laynie and Frank Jr's son. |
| | Mitchell | Dumont | Head of Mergers and Acquisitions. Josh's boss. |
| | Maya | | Mitchell's wife. |
| | Jeffrey | | Works in Sales and Marketing at Josh's office. |
| | Chrissy | | Jeffrey's wife. |
| | Debbie | | Josh's sister-in-law. |
| | Felicity | Lieberman | Co-worker of Josh. |
| 26 | Albert John | Compton | aka Granddad. Louisa's grandfather. |
| 28 | Connor | Ailes | Josh's competition for promotion. |
| | Trent | Trent | Josh's competition for promotion. |
| | Scott | Mackey | Josh's competition for promotion. |
| 29 | Charlie | | Acquaintance of Margot from a Long Island Hotel. |
| | Diane | | Leonard's secretary. |
