In the play Othello, the most powerful emotion is anger. This emotion helps to establish the plot, as it plays a vital role. Three characters that it affects in the play are Othello, Iago and Roderigo. All the characters vent their anger through violence and confrontations. Othello vents most of his anger by smothering Desdemona to death when she is on her deathbed. His anger slowly built up during the play, due to Iago falsely convincing him that Cassio and Desdemona are having an affair. It all starts when Othello sees Cassio and Desdemona together and Iago starts hinting at the possibility of an affair without actually coming out and saying it. "