@nprofile1q... looked into them and I recognize them as the artist of those amazing Cassie fnaf and smol pauline drawings. A few of their pieces are archived on places like r34 and paheal as well as a few... less useful sites.

Did a really superficial search and found a couple accounts on other sites with the exact same or similar names but they're mostly private. Might have to get a little more intense to find anything but it does like one day they just decided they wanted out.