Okay okay this is my theory and my theory changes every chapter but I'll let it all out. I think all of the characters are the developers of the game and were involved in the making and got stuck in it. Myab because of what Bada contributed he can remember all the gameplays and this night be the same reason why Doha has the ability to kill the slashers and mind u he didn't have this ability before teaming up with bada. And I have a feeling all the other characters also have some ability but they just haven't gotten yet and it's upto Bada and Doha to unlock a new route or ending for the other characters to also come out of npc mode. And also Bada's cousin is fucking sus as shit