In Othello, ethos is exemplified through the character of Othello himself, who is portrayed as a noble and respected military general. His reputation for honor and integrity is central to the tragic events that unfold, as his belief in Desdemona's unfaithfulness ultimately leads to his downfall. Additionally, other characters like Iago manipulate ethos by presenting a false appearance of honesty and trustworthiness to achieve their deceitful motives.