An Irish-American eccentric doctor in Berlin known for his unlicensed medical practice and philosophical advice, openly grappling with his personal identity issues.

A Viennese man clinging to old European traditions, driven by his complex family history and yearning for a noble legacy.

An American publicist who hosts an unconventional salon and falls for Robin Vote, her sincere and devoted nature contrasting with her partner's secretive lifestyle.

A middle-aged widow living off the inheritance from deceased spouses, defined by her tendency to mimic others and intrude into their lives.

The sensitive son of Felix and Robin, whose emotional development is impacted by his family's dynamics.

Felix's father, an Italian Jew who assumes a baronial title to escape societal limitations but dies before meeting his son.

Felix's mother, described initially as a strong Viennese woman, gives birth later in life and passes away shortly thereafter.

A circus performer and friend of Felix, known as The Duchess of Broadback, who openly embraces her stage persona.

A possibly fraudulent count who briefly appears to disrupt a party, pivotal in connecting the main characters.

A young girl residing in Jenny's house, infatuated with Robin, which causes tension with Jenny.