It was a case of "too old to be fired." I have nothing against older people, but in this case she was perfectly aware that she could sue the employer if she was fired. I'm not even sure how old she was, because she dyed her hair red and more wore heavy spackles of makeup, including lots of black eyeliner, false lashes, and bright rouge in her cheeks. She looked like a clown.
She never got any work done, instead she would slow down every project by creating drama. She would also spend a lot of time badmouthing her team members, complaining that we all got too much credit and she deserved more. Sometimes she would take a valium in the middle of the day.
Every year she took a one month long vacation, we would all look forward to that and get so much work done while she was gone, marveling at how peaceful things were without her.
After I left, I heard that a new-ish employee quit after screaming obscenities at the old crazy bitch. I wish I could have seen that.
Later I heard that she was retiring, and spent her last months in an extra-crazy state, wailing about "being put out to pasture." I wish I could have seen that too.