Totally fine on all accounts! :D I'll leave Facilier out then since while I'd love to see him done, he would mostly be as is, so not even really an AU or even unique story aside for "secret business partner of One's". xD Well, other than the offsite anthro design I gave him.
Though I do have a major project involving a Disney cookoff I wanna break into and seeing Faci in a chef hat would be hecking adorable. xD I'd imagine it like his regular hat but chef style.
Tbh, my idea of shadow creatures are basically just shadows of various shapes and forms. xD I don't refer to my OCs as humanoid unless they have a humanoid face, so I just call 'em shadow creatures in general. xD Though they're probably my easiest designs to draw due to being literally shadows given form.
I'll just link my OCs for now then, and see if anyone's got your interest; If it helps, I would most prefer to see NIGHTMARE, Overlord Zero, or One (especially One due to lacking in the guest art category), but if anyone suits you, great! If you need more designs, I can post some offsite OCs; They just won't have a select post for 'em yet since I gotta probably add or revamp my post for my offsite anthro designs.
(also just gonna add that I added some new chars over time, so adding Molluk, Extermina, and Mortify to the priority lists, but Extermina has centipede features in advance; Molluk and Mort are not going to be hosted on FR due to content, however. They can get pretty dark in lore so I don't want to post it here.)
Here is the post, and there is a TLDR version linked within, along with a post for couples (if by some chance you wanted to draw couples, but considering the thread being headshots and such, I don't expect or demand such a thing).
Tbh, you don't need to really worry about the ideas; I just needed a post for myself to link/use when requesting art, and I like to have some ideas in case someone needs help with poses (and to keep 'em in character).