Thanks for the feedback! I know that I might sound like I'm on drugs or something because literally I'm just a twelvie. But anyway, those things are just theories on my point of view, so inevitably there will be some mistakes being made. Now I have looked more into the old folklores and philosophy work left by the ancient Chinese and Japanese, I have a better understanding of supernatural things. (Again, sorry for the bad logic and horrible grammar!)
Personally, like you, I also more leaned to the Yukari and ZUN friendship theory. Not only it is more reasonable, but also less ambiguous in some way. I mean, the first time I touched the Touhou franchise I just noticed something different than other work. It sort of, just feel different, like, in a sense, it was too "real". If the other artists were to create a character like Yukari, then there IS a possibility that the character can well, come to life in some way and mess with our dimension. But, consider it, if this could happen, then the terrorists will have a far easier time doing their job. There is still too many doubts about this theory and I will have to look deeper to find the answer (Which could take 100 years!)
Well, there are also many researches going on about astral projection, and I sort of just experienced it at that time. However, there is one thing for sure in an astral projection that differs it from a normal dream, is that you can remember the dream very vividly, even after a long time, compared to a normal dream, which is almost instantly forgotted when waking up.