Iago manipulates several characters in Shakespeare's Othello through exploiting their weaknesses and sowing seeds of doubt. He turns Rodrigo's obsession with Desdemona to his advantage by getting money from Rodrigo. Iago plays on Othello's insecurities about his race and marriage to Desdemona to make Othello jealous. He uses Cassio's pride and desire to regain his position to further implicate Cassio in his schemes. Iago is a master manipulator who is able to gain people's trust while covertly influencing their thoughts and actions to suit his own malicious ends.