Matronly
To my mind, the word "Matronly" suggests somebody with a particular attitude to the workplace and their "customers" (as in patients). Being old enough to remember hospital matrons, some of them were quite young, but nevertheless very matronly. It is a very apt description of the outward persona of quite a few BA CC (and a few other carriers, AC comes to mind) in my experience.
Most Matrons were extremely well motivated to the technical care of their patients, and this may well be the case with the aforementioned CC, but their patients were unlikely to find them a source of joy and happiness !