I talk in here like I talk in real life. I’m highly articulate but I routinely use coarse, industrial language, that am not afraid to use in ‘refined’ company. It’s not an act, and nor is it calculated - it’s how I express myself and have done for many years, and to great effect I’d say.
I’m generally viewed an an exceptional communicator with highly developed people skills by those that know me in the real world, as well as being true to myself, and a genuine person by those I interact with. Nothing fake or calculated about me.
It all helps, of course if, like Rayner, you have huge reserves of self-confidence, in terms of being true to yourself.
Which is why I guess I found your reasoning in relation to Rayner to be poor, because I don’t personally see anything calculated. She expresses herself in a way that I view as natural to her, which for reasons of the foregoing I view as genuine.
I think your judgement of her is wholly wrong.