This is a wild guess of mine, but some of the hints being dropped in the past few chapters make me think that our skeleton hero might be Kevin Ashton, or someone very closely related to him.
Some indications for this are the strange pull he feels to certain objects like the flute in this chapter, the fact that his memories are sealed. He remembers nothing from before his death. And there probably are some other hints I didnt see which point to a direciton similar to this.
Im looking forward to where the story will take us