I noticed the change too. It's only my opinion of course but I've actually seen her called 'Michelle Masters' a lot more than 'Sophie etc'. I've been enamored by her for several years and it wasn't until sometime last year that I started seeing her regularly appearing as 'Sophie'. Of course someone may have an entirely different viewpoint too. I do think however it would be nice finding out what her name really is.
You know virtually every link in this thread has her listed as either "Sophie Paris" or "Sophie Wild"
I have seen her called "Kemmie" and "Zsofia" (on ATK) but this is the first time I have seen her called Michelle Masters.
I really don't get it