As Prospero's younger brother, Antonio is motivated by envy and by a desire to create trouble. He is now the fraudulent duke of Milan and is still actively engaged in plotting rebellion. His actions against Prospero were not sufficient to satisfy his ambitions, and now, Antonio convinces Sebastian to murder his brother. Although he may be frightened when confronted with the spirits and later Prospero, Antonio reveals no sign of remorse for the actions he has committed.
