Which of these literary characters appears in the Jean Rhys novel "Wide Sargasso Sea"?

"Wide Sargasso Sea" is a 1966 novel by Dominican-British author Jean Rhys. The novel serves as a postcolonial and feminist prequel to Charlotte Brontë's novel "Jane Eyre" (1847), describing the background to Mr. Rochester's marriage from the point-of-view of his wife Antoinette Cosway, a Creole heiress. Antoinette Cosway is Rhys's version of Brontë's devilish "madwoman in the attic". Antoinette's story is told from the time of her youth in Jamaica, to her unhappy marriage to an English gentleman, Mr. Rochester who renames her Bertha, declares her mad, takes her to England, and isolates her away from the rest of the world in his mansion. Antoinette is caught in a patriarchal society in which she fully belongs neither to Europe nor to Jamaica.

Jean Rhys (born Ella Gwendolyn Rees Williams; 24 August 1890 – 14 May 1979) was a British novelist who was born and grew up in the Caribbean island of Dominica. From the age of 16, she was mainly resident in England, where she was sent for her education.