| Pro | Stefan | | A soldier. |
| | | | Part One Paris, December 1918 |
| 1 | Walter | Rappaport | An industrialist. |
| | Monsieur | Batteau | A bookshop owner. |
| | Johann W. | von Goethe | A German writer and statesman. |
| | Woodrow | Wilson | 28th U.S. President. |
| | Marie | Antoinette | Queen of France. |
| | Louis XVI | | King of France. |
| | Margot | Rosenthal | Professor Rosenthal's daughter. |
| | Signore | DiVincenzo | One of the Italian delegates. |
| | Signore | Ricci | One of the Italian delegates. |
| | Tante Celia | | Margot's aunt. |
| | Archduke Franz | Ferdinand | The heir presumptive to the throne of Austria-Hungary. |
| | Johan | Rantzau | German-Danish general and statesman. |
| | Gunther | | Margot's dog. |
| 2 | Mrs. | Wilson | President Wilson's wife. |
| | Stan | Stahl | American ambassador. |
| | Gustav | Mahler | An Austro-Bohemian Romantic composer. |
| | Krysia | Smok | A pianist from Poland. |
| | Friedrich | Rosenthal | A professor and writer. |
| | Marcin | | Krysia's husband. |
| | Ignatz | Stein | The barman. |
| | Deo | Modigliani | An artist. |
| | Harold | Wilson | British Labor politician who served as Prime Minister of UK. |
| | David Lloyd | George | Welsh statesman who served as Prime Minister of the UK. |
| | Georges | Clémenceau | French statesman who served as Prime Minister of France. |
| | Vittorio E. | Orlando | Italian statesman. The Italian leader to the Paris peace talks. |
| | Vladimir | Lenin | Former Premier of the Soviet Union. |
| 3 | Lucy | | Margot's mother. |
| | Helmut | | Margot's acquaintance. |
| | Emilie | | Krysia's daughter. |
| | | | Part Two Versailles, April 1919 |
| 4 | Elsa | Maxwell | American gossip columnist and author. |
| | Georg | Richwalder | The military attaché to the delegation. |
| 5 | Peter | | Georg Richwalder's brother. |
| | Alice | | Georg Richwalder's sister. |
| 7 | Leigh | Arrington | The daughter of a British viscount. |
| | Frédéric | Chopin | Polish composer and virtuoso pianist of the Romantic era. |
| | Rosa | Luxemburg | Polish Marxist, philosopher, economist, anti-war activist. |
| | Herr | Mitten | A doctor. |
| 8 | Mildred | | A nurse. |
| 12 | Lieutenant | Bouvier | Georg Richwalder's acquaintance. |
| 14 | Greta | | A maid. |
| | Oscar | Wilde | Irish poet and playwright. |
| | Lucinda | Rose | An actress. |
| | | | Part Three Berlin, August 1919 |
| 16 | Elsa | | A maid. |
| 19 | Charles | | The butler. |
| | Noel | | Uncle Walter's aide. |
