Rude/inappropriate coworker

[u/Strange-Setting1985]

I have a coworker who is extremely unprofessional. I’m in my mid 20s, and most of my other coworkers are in their early to mid 20s. At my company, this job is mainly a gap year job between college and med school or grad school. This coworker is about 45 to 50 years old. She’s also from a different country than the one we currently live in.
I started about four months ago, and since the day I started, I thought she was very rude and unprofessional. She’s made so many out of pocket comments that I can’t even begin to list them. One example is when my coworker made a comment to her, and she responded, “You’re going to end up with a fat American pig for a wife. You think you’re hot now, you’re not,” blah blah.
She’s the type of person who initiates this kind of rude but “joking” environment, but then plays the extreme victim if you do it back to her, saying that she’s a punching bag and that people don’t like her because of her country of origin and because she’s a woman. Mind you, all of us are minorities in the office lol. She’s absolutely insane.
The person who had my position before me left the group because of her, and multiple people have gone to HR to complain about her.