From Shakespeare's play Othello, this paper will be discussing the roles of Cassio, Roderigo and Brabantio, and their functions. First, Cassio. Cassio is an honourable lieutenant and a soldier, who is very loyal and caring towards his commanding officer, Othello, as shown in one of many places, act two scene one line 45-48 when he is concerned about Othello's well being because he has been lost at sea and says: Thanks, you the valiant of this warlike isle, That so approve the Moor! O, let the heavens Give him the defense against the ....