Bianca is a courtesan in Cyprus.
Though she makes her living by selling her body, she is madly in love with one of her clients, Cassio, and dotes on him to excess. She hopes that he will marry her, and does not seem to realize that he laughs at her. Even when he gives her a handkerchief that she is convinced he received from another woman, she begs him to come to dinner at her house. She is arrested on suspicion of being involved in the assault on him.