(The below is all another heap of personal rumination. I have no new data.)
Wish we knew what happened with this girl - how she is, what she looks like now, etc.
The mystery is almost maddening, when talking about a woman as strikingly beautiful as Yulia was when Kisu did that flurry of photography.
Guess everyone has the right to change their minds, retire if and when they want to. This seems perhaps even more relevant, when you consider that, across all the images taken, they appear to be from one consolidated period of time. Makes one think that the choice of posing was merely a lark, not a significant career choice. If that was the case, the fact that Kisu dribbled out all the single body of material over a period of Years - masked the likelihood that Yulia had left that part of her life years behind by the time all the apparent 'new' material dried up.
I wouldn't be surprised if she looks notably different today. If she never wanted a public life, perhaps especially in this career context, it's possible she wouldn't even want to be recognized.
But, Unless -- she made some radical body changes or if life itself changed her beyond her control -- you might suppose that otherwise she could still look pretty good, or hopefully even better.
At times, the mystery gnaws at me, the lack of closure. In general I would wish her well, hope that she's happy, healthy, and has a nice life.
I can hope that, if she had to disappear, that she got swept up by her very own prince charming, and whisked off to live happily ever after in a castle in the stars.
Or, perhaps in a more egalitarian view, that she rallied personal powers and skills, and has a killer conventional career somewhere, somehow. Replete with the rewards life has to offer.
If not, and if she retained even a glimmer of what she had, I would seriously consider contributing to a kickstarter or patreon in her behalf. To have the opportunity to catch that glimmer again once in a while.
Wouldn't you?

-D'Artagnian
Wish I had a pic of her to post that you haven't seen already.