I can see what you mean about the Mucha influence in the corona, the hair and those gorgeous muted green and rose hues, although I can't off the top of my head recall any three-quarter portraiture he did.
I saw the picture and was like, wow, that reminds me so much of Alphonse Mucha, whom I adore, and then I read your comment and it all made sense. Hehehe I really enjoy your work! They are all so lovely! (especially this one)