Responses
Remember Rei and Kazuha existed since childhood. Then the others branched off of them to carry even more burdens. (The child personality because he missed Yuuma, the female one because he was never treated right, the germaphobe because he always saw his mom being slutty, Kazuha just to keep his dad from abusing him)
Yea.. actually DID is caused from childhood trauma.. if yall are interested u guys could check out DissociaDID in yt
So I'm back...so i think cross guy may be the original.......i looked over chapter 8 again and how they were all okay disappearing. And when they started to fade their dust returned to him. I think Rei was created because Kazuha was created who never spoke up for himself against his dad, but also wanted to be the son he approved of. But its just a thought, could be wrong.