| Mrs. | Ashworth | The bank teller. |
| Dr. | Braun | The European Traders Association President. |
| Lord | Calvert | One of Dr. Hasselbacher's patients. |
| Chief | Engineer | The chief engineer of the Juan Belmonte. |
| James | Frazer | The Scottish anthropologist. |
| Emma | Hasselbacher | Wormold's friend and doctor. |
| Mr. | Humpelnicker | One of Wormold's customers. |
| Miss | Jenkinson | The Chief's acquaintance. |
| Charles | Lamb | An essayist. |
| Henry | Leadbetter | A civilian researcher. |
| Mr. | MacDougall | The man that Mr. Wormold met. |
| Father | Mendez | The Priest. |
| Reverend | Mother | The school's headmistress. |
| Thomas Earl | Parkman | The boy that Milly set on fire. |
| Vincent | Parkman | A political figure. Thomas's father. |
| Senor | Perez | Milly's acquaintance. |
| Lord | Rutherford | The New Zealand physicist. |
| Luis | Sanchez | A professor. |
| Captain | Segura | The chief of police in Vedado. The man Milly falls in love with. Aka: The Red Vulture. |
| Beatrice | Severn | Mr. Wormold's half-French secretary. Also an encoder. |
| Mr. | Svenson | The Scottish man that Mr. Wormold met. |
| Soy | Teresa | Teresa's sister. |
| Jim | Wormold | A vacuum cleaner salesman. Spy. Protagonist. Aka: Senor Vomell. |
| Milly | Wormold | Mr. Wormold's daughter. Aka: Seraphina. |
| Alice | | Milly's aunt. |
| Angelica | | One of Miss Jenkinson's workers. |
| Carter | | One of the nucleaners. |
| Cetewayo | | The King of Zulus. |
| Cifuentes | | An engineer. |
| Edward | | Milly's uncle. |
| Hans | | A young pilot. |
| Hawthorne | | A British Secret Intelligence. |
| Henry | | One of the spy agents. |
| Lopez | | Mr. Wormold's assistant. |
| Maria | | One of Professor's lovers. |
| Marie | | A French girl at the convent. |
| Mark | | Mr. Wormold's nephew. |
| Mary | | Mr. Wormold's ex-wife. |
| Miguel | | The beggar. |
| Peter | | Beatrice's husband. |
| Rudy | | Mr. Wormold's assistant accountant. |
| Teresa | | A night club dancer. |
