Alexandro

Alexandro is a noble in the Portuguese court. He is falsely accused by Villuppo of accidentally causing the death of Balthazar in battle. He is condemned to death by the viceroy, but the truth eventually comes out, and Alexandro is released.

Ambassador of Portugal

The ambassador of Portugal acts as a liaison between the courts of Spain and Portugal.

Balthazar

Balthazar, the prince of Portugal, kills Don Andrea in battle, and thus becomes the object of the desire for revenge exhibited by Andrea's ghost. Balthazar falls in love with Bel-Imperia, angering the ghost still further, since Andrea was Bel-Imperia's lover. Balthazar is frustrated by Bel-Imperia's lack of affection for him, and he participates in the murder of Horatio, whom Bel-Imperia loves, in order to remove his rival. In the play-within-the-play, Balthazar plays the role of Soliman, the sultan of Turkey. He is stabbed to death by Bel-Imperia.

Bel-Imperia