If he goes to war she will always be there for him and support him. She completely and selflessly pledges her life to serving him. She would never be dishonest or deceitful to her husband that she so dearly loves. Her gentle touch to even the worst situations is why she personifies the side of good in this play.
The side of dishonesty, hatred, cruelty and other characteristics associated with evil is personified in the play by Othello's thought-to-be friend, Iago. Iago is truly a dastardly wretch of a person. His character traits are similar to that of the serpent in the story of Adam and Eve. Before the play starts, Othello was given the military rank that Iago had hoped for himself. This is where the jealousy starts and his deceit begins. Iago does very evil things throughout the play, but most evil plot that he schemed was to break the bond between Othello and Desdemona. Othello trusts in Desdemona until the third scene of the third act when Iago convinces Othello that Desdemona could be messing around with another man, Cassio. Othello believes that Iago is being a good friend by informing him of this, however Iago's true intentions are hidden. In that same scene, Iago says some very ironic words: "Men should be what they seem;/ Or those that be not, would they might seem none!" (3.3.126-127). He is speaking of how Cassio is not what he seems; however he is the one who is false. After convincing Othello of Desdemona's infidelity, Iago goes to speak with Emilia who has found the handkerchief given to Desdemona by Othello when they first started seeing each other. After obtaining this handkerchief, Iago says: .
I will in Cassio's lodging lose this napkin,.
And let him find it. Trifles light as air.
Are to the jealous confirmations strong.
As proofs of holy writ: this may do something.
The Moor already changes with my poison:.
Dangerous conceits are, in their natures, poisons,.