| 1 | Emily | Arundell | The last survivor of the Arundell Siblings / Writes to Poirot. |
| | Mr. | Jones | The grocer. |
| | Mrs. | Lamphrey | Woman who works at the post office. |
| | Willhemina | Lawson | Emily's companion. aka: Minnie. |
| | Theresa | Arundell | Emily's niece. |
| | Charles | Arundell | Emily's nephew / Theresa's brother. |
| | Bella | Biggs Tanios | Theresa and Charles's cousin. |
| | Jacob | Tanios | Bella's husband. |
| | Bob | | A fox terrier / Emily's dog. |
| | Spot | | The butcher's dog. |
| | Caroline | Peabody | Emily's friend. |
| | Rex | Donalson | Theresa's fiance. |
| | Charles L. | Arundell | Emily's father. |
| | Thomas | Arundell | Emily's brother. |
| | William | Purvis | Solicitor. |
| | Mary | Tanios | Bella and Jacob's daughter. |
| | Ellen | | Emily's long-time servant. |
| 2 | Edward | Tanios | Bella and Jacob's son. |
| 3 | Julia | Tripp | A spiritualist who lives in the Little Green House. |
| | Isabel | Tripp | Julia's sister. |
| | Dr. | Grainger | Emily's long-time doctor. |
| | Arabella | Arundell | Emily's sister. Deceased. |
| | Matilda | Arundell | Emily's sister. Deceased. |
| | Agnes | Arundell | Emily's sister. Deceased. |
| 4 | Mary | Fox | The woman Emily met in Cheltenham. |
