It is indeed a bone-wrench, for those reasons! I've designed his wife, but she doesn't have one; I could easily edit it to include one though, and that'd make sense!

I'm using the fact that it's a fantasy setting to just do whatever with the clothing! Dayvha's wearing essentially a Hawaiian shirt, which weren't exactly common in Mediaeval times... though I suspect there's a big difference between 'fantasy Mediaeval' and real mediaeval anyway? Ossoum's got a tie because the sternum bone looks like one!