They're all different characters, as the show isn't the books. TV Cersei isn't a temptress nor is she as manipulative.
Of course, but there are some characters that I feel truly are their book version brought to life on the show. Joffrey, Varys, Roose, Ned, and even Stannis aside from the one lustful scene in Season 3.
It's not necessarily a bad thing, but hard to separate the two