It’s a well-known fact that Nancy does not get along with many of her coworkers.  We first start hearing specific details when Rachel makes the mistake of telling Nancy some of them. Beyond that, beyond what we hear Nancy complaining about, all we have seen is her ongoing rivalry with her coworker, Stella.

Beyond that, not counting the ones who are not her family members, the only one we see Nancy getting along with is Rachel. Though, she doesn’t count since Nancy has her completely cowed.

Incidentally, Dielle has met Rachel. While I can’t speak for the twitch, but she seemed very desperate to keep on Nancy’s good side.