What I usually do is minding my own business. I have been in such scenerio before during my first job and things weren't really good for me. She literally used to despise me probably because I was new to the work and used to make mistakes and since she was my partner, she felt like I was dragging her behind.What used to help me is that, I used to just focus on my work and with time I was good.
Generally, whatever you're doing just give it your best. Don't do for the sake of pleasing some people or because you're getting paid. Let integrity guide you always. You might find yourself in such a situation and you end up in an argument with them and you might end up losing your job. And it's not always good to start arguments with your fellow workmates. Just play cool with everything.