| Edward | Arnold | Clara's art tutor. |
| Frank David | Bell | Clara and Maddie's grandfather. |
| Celestine | Bell-Sommers | Violet and Matthias's daughter. |
| Nellie | Bly | Violet's best friend. AKA: Elizabeth Cochran. |
| Charles | Hancock | Clara's rich fiancé. |
| Miss | Ingram | Clara's first tutor. Deceased. |
| Jacob | Klein | The Frenchman that Maddie met. |
| Mr. | LaChambre | Violet's old acquaintance. |
| Lucia | Lambretti | Matthias's niece. |
| Violet | Lawson-Bell | Narrator. |
| Mr. | Malraux | LaChambre's great-nephew. |
| Gerald | McDougal | A publisher at New York Herald Tribune. |
| Helga | Meyer | Margaret's maid. |
| Daniel | Miller | The man that Maddie met at the poker table. A theatre critic. |
| Giani | Morelli | Matthias's son. |
| Isabela | MOrelli | Giani's wife. |
| Matthias | Morelli | Violet's lover. Clara and Maddie's real grandfather. |
| Clara | Sommers | Violet's granddaughter. Maddie's sister. |
| Madeleine | Sommers | Violet's granddaughter. AKA: Maddie. |
| Mrs. | Sommers | Violet's daughter. |
| Lacey | Strauss | Robert's wife. |
| Robert | Strauss | Charles's business colleague. |
| Jule | Verne | The writer of Nellie Bly's travel. |
| Eliza | Wainwright | The Wainwright's daughter. |
| Juliette | Wainwright | The Wainwright's daughter. |
| Mrs. | Wainwright | Mr. Wainwright's wife. |
| Walter | Wainwright | Maggie and Clara's co-traveler. |
| Annabel | | Edward's wife. |
| Billy | | The man that Maddie met at the public library. |
| Henrietta | | Violet's nurse. |
| Jenny | | Maddie's roommate. |
| Margaret | | Violet's sister. |
