Othello Act 1, scene 3

Duke Powerful man. He likes Othello and recognizes the need for Othello to lead the Venetians against the Turks, at Cyprus.
Brabantio Warns Othello: “She may one day betray you, as she did me.” He states he wishes he had never had a child.
Iago Speaks with Roderigo–tells him to sell everything, if he wants to get Desdemona. When Iago speaks to Othello, he promises to take Desdemona to Cypus, and Othello completey trusts him.
Roderigo Depressed and speaks of suicide. Believes Iago will help him with a plan to get Desdemona.
Desdemona A young woman very much in love with her new husband. She stood up to her father, explaining that she is only pledging her loyalty to her husband, Othello, as her mother did to him.
Othello Promises to be true to Venice and lead them to victory against the Turks. He will not be distracted by his new wife. He asks Iago to bring her to Cyprus, in a ship sailing behind Othello and Cassio.
Relationship of Othello and Iago Othello completely trusts Iago. The audience has heard Iago’s plan in his soliloquy: he is plotting revenge against Othello.