Shakespeare intended that Iago be a static character, but he is in no way described as a simple man. Iago was created to be the catalyst of the play, a character fuelled by jealousy. In Othello, Shakespeare utilized the theme of jealousy so that the audience feels powerless to help the circumstances within the play. We are given soliloquies that give insight to Iago's true character and intentions, enough to know and understand that he is a two-sided character. The humble companion and friend he is to Othello, is not the man who the audience interpret him to be. At times Iago is almost devilish in his ways, and it is easy to forget that he is a human character, as susceptible and capable of emotion as you and I. Iago wears a mask when facing other characters, the mask of honesty. However when he finally throws his mask down, his true conniving nature is revealed. Shakespeare created Iago as the spitting image of Satan, such as Iago has his own mask; Satan works with his own disguises. A classic example is in the biblical story set in the Garden of Eden. The audience views that Iago manipulates the power of jealousy that has taken control over him to control other innocent characters and corrupt them also. It would be unfair to say that Iago is a simple character; rather, Shakespeare uses various techniques to make him the complex man he truly is. Though soliloquies provide a clear insight into Iago's true nature, the means by which Shakespeare utilised situational irony to further characterize Iago is an important aspect to consider when contemplating his manipulative nature. Shakespeare understood that for Iago to have influence in the plot he needed to deceive the other characters. Iago needed to be immoral, knave and completely contrary to the 'honest' man he claimed to be. .
There are several traits inhibited in both Iago and Satan that extends the complexity of Iago's character and ability to manipulate others.