It went way better than I anticipated! She was reprimanded by management and told not to contact me. They told her flat out that contacting me is unnecessary in the first place and to stay out of my accounts. If she sends me any email ever again, it has to be cc'd to my boss and manager. That alone is enough to stop her, because I think the secrecy of it all was what she was really into, being a bully under the radar, like the kid who kicks you when the teacher isn't looking.

I'm ALSO being promoted in the new year, which I think is management's way of saying "We're sorry, we want to keep you, please don't go away." This removes me from the bully's sphere entirely.