Which sentence best displays an annoying character? while yawning, she asked me to repeat what i said. talking louder than the others, she detailed the plan. wise talking tiffany elbowed her way into the room and began shouting. leaning in just a bit too close, the hint of garlic clings to her, as she gently reveals how i could be less annoying.

Out of the three the most annoying would be Tiffany.   
Not covering your mouth while yawning shows a sign of disrespect and disregard to the person that one is talking to. Although it shows that the person is not interested in the conversation being discussed or the speaker himself is boring. It's a sign that he or she didn't have a proper rest before appearing for the meeting but that does not mean she is as disrespectful as Tiffany she is forcing herself to pay attention because she asked the speaker to repeat.  
On the other hand, the person that talked louder probably wanted the speaker to hear her very well and also others that are in the room. It shows that she is interested in the speaker and whatever the speaker had to say unlike Tiffany that came late, elbowed her way in and didn't brush her mouth or used deodorant as she smelt of garlic.