He apparently has had a difficult past and this may cause the audience to sympathise with him, Being taken by the insolent foe and sold to slavery In the second scene, when we actually meet Othello, we see that he is not at all like how he was portrayed in the first scene.
When Iago tries to warn him of Brabantio's anger, he refuses to go into hiding, saying, "Let him do his spite. He says "you shall more command with years than with your weapons Even now, now, very now, an old black ram Is tupping your white ewe!
Unlike many of the characters, he has a very balanced temperament and does not fly to passionate fury, instead analysing a situation and trying to calm the tempers of others, Hold your hands, Both you of my inclining and the rest: Were it my cue to fight, I would have known it Without a prompter.
The audience gets a full showing of Iagos lack of integrity here as he displays prejudice, even though the target of his contempt is not only a well-respected and superior officer, but also he is not present to defend himself.
And raise some special officers of the night.
However, when we actually meet Cassio in the first act, he comes across as innocent, a contrast to Iagos image of him as a confident lady-killer who is handsome, young and hath all those requisites in him that folly and green minds look after, he is also apparently quite loyal to Othello.
Despite the way Othello is described in the first scene, he shows himself to be quite different in the second.
Othello is confident in his actions and refuses to run away like a coward, having done nothing wrong.