Final answer:
Fitzwilliam Darcy is a protagonist in Jane Austen's 'Pride and Prejudice' and not associated with 'Jane Eyre', 'Wuthering Heights', or 'Sense and Sensibility'.
Step-by-step explanation:
Fitzwilliam Darcy, also known as Mr. Darcy, is a character from Pride and Prejudice, a novel written by Jane Austen. In the book, he is a complex individual and can be considered a protagonist alongside the central character Elizabeth Bennet. Contrary to the options given in the question, Mr. Darcy is not an antagonist in Jane Eyre, a character in Wuthering Heights, nor a villain in Sense and Sensibility. All these novels are distinct classic works written by different authors: Charlotte Brontë wrote Jane Eyre, her sister Emily Brontë wrote Wuthering Heights, and both are separate from Jane Austen's body of work, which includes Sense and Sensibility, where the villain is another character entirely.