
Don Juan's uncle, Don Pedro, comes to arrest the offender. However, when Isabela wants to light a lamp, she realizes that he is not her lover, the Duke Octavio, and screams for help.

The play begins in Naples with Don Juan and the Duchess Isabela who, alone in her palace room, have just enjoyed a night of love together.

Marqués de la Mota – another womanizer, who is in love with Doña Ana.Tisbea – peasant girl seduced by Don Juan.Don Pedro – Don Juan's sympathetic uncle.Doña Ana – noble woman and Don Gonzalo's daughter is engaged to Don Juan for a time (but the engagement is broken off).Don Gonzalo – nobleman and military commander, Doña Ana's father.Duchess Isabela – Duchess that Don Juan tricks she was going to marry Duke Octavio.

