Wait, it's making me curious

I think the shaman couldn’t live without the king so they did some sort of ritual that made him become a ghost too so that they can be together. I think it’s a bittersweet ending . Still happy in my opinion because they get to be together

Ohhhh yeahh more likely. I also think it's a bittersweet ending because of the king becoming a demon and they never experience a peaceful life

But they seem like two different people (past him and his present self, the shaman.) Which one is the real him? Are they the same person or two different people?