Artist mentions that this outfit is inspired by Tharja (Fire Emblem)'s Santa costume though simplified. I see a bit of the resemblance.
Also, just saying, but I do think it's slightly cringe that an Approver 1upped it but then left mine in pending, so it had to be approved by a different one, out of some weird aversion to approving anything uploaded by me. I don't mind getting sniped here - I forgot to prepare for the BlueSky upload - but the least you could do is approve what you 1up.