Naa, she most likely felt like the Kween of fashion, there to breathe freshness and glamour into the stuffy old English family. Especially with "that boring Katie".
If she had any self-awareness, or rather, if her narc-ness allowed her to accept what her self-awareness was telling her (because she is insecure as hell we can see that), then she wouldn't have even thought of not accepting the advice of far more experienced people, especially in the beginning.
I've just joined a new organisation, a new industry with a completely different work and social culture than what I'm used to. I stay quiet and observe, then I copy. We've had a couple of 'fun' virtual events, I played it safe and dressed conservatively, but nicely. Now I have a better idea of how other women are dressing, so after a few more meetings when I've met most people, I'll start wearing more fun clothes/makeup for the virtual parties. Will start speaking up more as well.
This is what anyone with half a brain does. Assimilation takes time, a bit of cleverness and effort. That was the difference between plunderers like Ghori and Ghazni who would come to India often but have only short campaigns, and the British, the Dutch, the Portuguese, who came as friends, travellers, historians, traders and missionaries, so many settled here, and then they were able to do what they liked for centuries. These cultures are still a part of the Indian culture to the extent that we sometimes don't know what tradition was brought by Europeans and what was 'native'. They changed our social fabric almost completely in many ways. That's how it's done!
Smegs majored in international relations? Really?