She’s been shunned by other blacks everywhere she goes. She votes Conservative. Because her education during the formative years was under a British system, her dialect is clean of all African-Americanisms/pronunciations. She is Christian (in the true sense of the word, so “it is the Spirit which gives life, the flesh profits nothing”).
She does not join in when her African-American colleagues talk about “Whites did this,” etc. I’m not sure if she’s been told that to her face, but I am sure many have/would feel that way towards her.