It's a fake account that uses her stuff to promote phishing porn sites. She complains about it like every 3 months when one of their posts gets popular, it sadly never gets banned.
What happened to the model around the time of the Lancer Alter set? Is it a new person or just surgery and lots of different editing? I see some people on Exhentai talking about changed moles, and of course the breasts are clearly different.
I'm not sure whether Hokunaimeko is meant to be a model or a group. Exhentai has a group tag but it's not used for the galleries in question, they all use the model tag instead. That could just be a clerical error, though, which is why I ask. There are some comments on the galleries that talk about moles that have gone missing, along with the more obvious change in breasts and areolae.