| 1 | Elizabeth |
Wright | A nurse, protagonist. Aka: Lib |
| | Dr. |
McBreaty | Anna's physician |
| | Maggie |
Ryan | One of O'Donnell's neighbors |
| | Florence |
Nightingale | Lib's professor, renowned nurse. Aka: Miss N |
| | Anna |
O'Donnell | Lib's patient |
| | Sister |
Michael | Anna's nurse |
| | Mr. |
Thaddeus | The priest |
| | Patrick Mary |
O'Donnell | Anna's brother. Aka: Pat |
| | Malachy |
O'Donnell | Anna's father |
| | Rosaleen |
O'Donnell | Anna's mother |
| | Mr. |
O'Flaherty | Anna's teacher |
| | Kitty |
| Anna's cousin and family maid |
| | Agnus |
Dei | Latin word meaning "Lamb of God" (religious symbol) |
| | Mr. |
Reilly | Photographer |
| 2 | Madame |
Defarge | Character in Charles Dickens's novel |
| | Mr. |
Ryan | Maggie's father; the publican |
| | Dr. |
Standish | Chief of medicine in Dublin |
| | William |
Byrne | Journalist |
| 3 | Colonel |
Wade | Former agent to the Governor-General of Punjab |
| | John |
Flynn | Farm owner, Malachy's friend |
| | Polly |
| Byrne's horse |
| 4 | Otway |
Blackett | A baronet |
| Epi |
Eliza | Raitt |
Lib's alias. Aka: Eliza Raitt |
| | Wilkie |
Burns | Byrne's alias. Aka: Wilkie Burns |
| | Nan |
Burns | Lib and Byrne's daughter |