@Exhumed Legume
There is some art, which wasn’t ever reposted to KelpieMoonKnives, and reposts of questions related to that poll. I was unable to find anything related to FKB Tumblr in KMK Tumblr around August 2016, when first posts came.
So, that may be Kelpie himself, or somebody impersonating him (in that case, that person done very well). Easiest way is to ask, or also there is a huge archive of every drawing he did somewhere on his Tumblr (if I remember correctly).
UPD: it’s Kelpie, may be aliased
http://kelpiemoonknives.tumblr.com/post/165145585785/
UPD 2: We usually use one tag for each artist until artist request different, right?..