The American son of a clergyman who is on the way to becoming a renowned psychologist when he falls in love with Nicole and marries her. Dick is extraordinarily charismatic and graceful at the start of the novel, but eventually falls to his ruin.
Born Nicole Warren, the beautiful heiress to a wealthy Chicago magnate, Nicole was sexually abused by her father and suffers from mental breakdowns as a result. She falls in love with Dick at first sight, and the two enjoy an extravagant and turbulent life in Europe at the center of a sophisticated group of friends.
The beautiful young movie star, born in America but educated in France, who falls in love with Dick at first sight and contributes to his dissipation through their affair.
The half-American, half French-mercenary soldier who is in love with Nicole. He ends up taking her away from Dick toward the end of the novel.
A dear friend of Dick's and a once brilliant musician who drinks away his career. He is ultimately killed at a speakeasy in New York.
The lovely and kind wife of Abe. She marries the wealthy Conte di Minghetti after Abe passes away.
The anglophile older sister of Nicole.
Born into a line of fine psychologists, he opens a clinic with Dick.
The wealthy father of Nicole and Baby. He sexually abused Nicole and then placed her in a mental clinic in Zurich.
The once obnoxious American intellectual with an inferiority complex who establishes himself as a prize author following his duel with Tommy Barban.
The obnoxious, self-important wife of Albert McKisco.
A young Yale graduate and acquaintance of Rosemary. He gossips with Dick about Rosemary and helps rescue Dick from an Italian prison.
The twice-widowed mother of Rosemary Hoyt.
A British snob whom Dick insults gravely and then rescues from prison.
The second husband of Mary North, whom Dick and Nicole manage to insult terribly.
An American filmmaker in France toward whom Rosemary maintains a momentary fascination.
A heavy, effeminate friend of Albert McKisko's, he takes Rosemary to watch the duel.
A black man who is killed in Rosemary's room in Paris on account of Abe North's careless drinking.
Dick and Nicole's son and daughter.
An American woman who snubs Nicole at the train station before killing an Englishman with a revolver.
The Russian Prince whom Tommy Barban rescues from Russia.
A psychologist who initially handles Nicole's case and urges Dick to terminate his relationship with her.