That's a most amazing awesome post. I've always wanted to have a site collection fan pages of the popular JAV stars. That one post there is a perfect example.
Another great post. I am not even Hitomi's fan (too big for me). But I do agree she seems like a wonderful human being.
About the “personas", it's only human and very normal for a person to adopt the mannerism, speaking tone etc that she
believe to be
expected, or she believe can help her to project an image of herself on the others. To be unable to do so is autistic, to be unwilling to do so is sociopathic. According to the interview, these girls' experience with the English world is from working at Las Vegas and particularly at AVN and the US porn industry. So on top of the huge difference in language and culture between Japan and America, you also have the whole Silicone Valley culture affecting these girls. So I'm not surprised their "English persona" isn't most attractive to us.
But I want to point out it's absolutely normal (non-sociopathic) to modify your mannerism according to the environment and audience. So I would not use the word "persona" which a bit too heavy on the psychobabble.
Actually it's great credit to this Richard guy to be able to interview these girls in their natural personalities.