Iago is the antagonist in Shakespeare's play Othello. He is a manipulative and deceitful character who plots against Othello, the protagonist, in order to gain power and revenge. Iago is a master of manipulation and uses his skills to manipulate those around him in order to achieve his goals. He is a complex character who is both villainous and sympathetic at times. He is often seen as one of the most iconic villains in literature.