give at least one quote that shows us what this character is like.

http://www.gradesaver.com/othello/q-and-a/give-at-least-one-quote-that-shows-us-what-this-character-is-like-126883

Iago: Jealous

I hate the Moor:

And it is thought abroad, that 'twixt my sheets

He has done my office: I know not if't be true;

But I, for mere suspicion in that kind,

Will do as if for surety. (1.3.379-383)