Don Juan (Protagonist/Hero): A young boy, only 16 years old. Very handsome, rich, and innocent. Fell in love with Julia.

Don José (Hero's Father): Juan's father, who is unfaithful to his wife and careless of his reputation.

Donna Inez (Hero's Mother): Juan's mother, a learned woman plagued by her husband's infidelity. One of her chief interests is the education of her son.

The Narrator: A friend of Don Juan's family. He is dismissed from the story in the first canto, and the omniscient author takes his place.

Donna Julia (Hero's Girlfriend): The wife of Don Alfonso and a friend of Don Juan's family. She is twenty-three and unhappily married.

Don Alfonso (Heroine's Husband): The husband of Donna Julia. He is fifty and fails to give his wife the love she desires.

Antonia (Heroine's Maidservant): Donna Julia's maidservant who helps her in her intrigue with Don Juan.