Because spit personality disorder exists. It doesnt manifest itself all the same, but it is rather accurately depicted that they do have similar memories, they are just fragmented due to trauma. While Huimin has remained consistent. Ive just read bit further the raws and its explained more, i just dont get why ppl are that confused unless they just read that type of story tor first time. If so it is what it is.
Im not saying it doesnt exist, nor am I denying DID isn't a thing. What I am saying is that fragmented memories is a stretch, whereas rewritten memories (considering one is a story and the other is the real world) makes more sense...
But if youre saying that in the raws it explicity says that Huimin was never real and the real world doesn't exisit, then I'll conceded

Chat I’m so lost help-