Talk:Dekalfar Demon Swordsman, Heim/@comment-25390479-20150330030833/@comment-11372432-20150330033215

http://en.m.wikipedia.org/wiki/Hyakki_Yakō

That's the probable inspiration, but it's obvious that Bushi is making up Hundred Demons as this guy is from Norse myth, while Orthros is from Greek myth (and I think Cocytus too?) and Gran is just made up, as far as I can tell.