Iago is a character from William Shakespeare's play 'OTHELLO'. He is a villainous figure who manipulates the other characters in the play to his own ends. Cassio is a soldier in OTHELLO's army and is manipulated by Iago into a fight with Roderigo, which leads to his demotion. Emilia is Iago's wife and is a loyal friend to Desdemona, OTHELLO's wife. OTHELLO is the protagonist of the play and is manipulated by Iago into believing that his wife is unfaithful. All three characters are victims of Iago's machinations.