✔ 最佳答案
I've dealt with bullies, and my guess is while you say that most people hate her, that isn't the case. In fact I'm sure most people suck up to her so they won't get bullied. If she was unpopular, 1. you wouldn't care as much 2. she probably wouldn't be so outspoken.
In this case avoidance is key. Don't look at her, don't talk to her, and if she wishes to speak with you answer with a boring one to three word sentence. If all she can say about you is that you wear too much makeup, then she'll eventually get bored of repeating the same thing and leave it alone.