Responses
I'm guessing it's the ghost who serves his majesty from the past? lol that's all I can come up with :)) after rewatching it, there was a line where the shaman (joohwa) speculated that he's just an extension of his past, so that further proves this theory.
Or it could be another ghost, another entity like you said :)
You are 100% right
Here's my explanation
https://www.mangago.zone/home/mangatopic/15269050/
I dont understand what happened to them :(( also what did the shaman mean when he said "it wasnt you?" to the king? Does that mean the weird things happening to him (sleepwalking, waking nearer the shrine) were all caused by some other entity? Then who was that entity? what was the meaning of it? Who was his God sending all those weird signals to him when His Majesty wasnt even around bc he was staying away? gosh that was so unsatisfying theres so many questions