Where did you get the idea that “dandadan” is the “fusion of all yokais”?
I thought saint germain was some kind of alien ally? Why is helping a “fusion of all yokai” become the ultimate yokai? Okarun once presented a theory that the only thing keeping aliens from attacking earth once and for all are the yokais that they can’t predict or even measure the power of. So I’m assuming this is indeed an ALIEN vs. YOKAI story
I need some backstory of who these people are because as of now, random characters just keep popping up. Who are they allied to and are they really enemies??

This isn't a spoiler just what I understood from the chapter 226
It's pretty obvious that the thing on the chair is the dandadan/the fusion of all yokais and that it hired count sangermain to get all the powers to it and somehow the powers from the fairytale card and our protagonists are related (maybe with them not being adults? Idk) and I assume "pinoquio" is evil eye wich only leaves the little red riding hood as a unknown character