Well now this is just sad almost every story I enjoy turns out to be dead or abandoned

Looking at the fact that you haven't updated in a while, I can say you might be either on a long hiatus or being a dick by leaving it on the climax and would eventually drop it due to lack of ideas and/or motivation, like all those other potentially great fanfics out there...

Well, done with the rant, onto the review. At first I was like: what...? during the middle but it eventually became bearable with this Evil Mastermind Yumemi thing going on, including the other stuff set in motion already.

Now, I just need to know what would happen next? The pieces are finally going to move for the climax, but that would mean that you need to update...

Also sorry, it's just that I've been here reading the FoZ x Touhou section for some time now and ALL of the better ones (or ones with good concepts) are all half dead! Except for 2 which are already completed. With this being the final one I'm reading, I'm sad to see something good to take so long to update... (then again it's all too common of an occurrence here in ...)

very good.

They are doomed.

Ah, so that's why the gap Youkai is doing nothing.

Well, I hope Yumemi wins. A Western Gensokyo, hell yeah. More fun crazy girls you can't help but love. Seriously, the Touhou girls are virtually gods, literally in some cases, compared to the ZnT mages and elves. Have them flaunt it and blast them to the other side of the continent. We got a maid that can stop time and summon an infinite amount of knife.

Things are moving too fast and what I mean is that people are learning all this information and facts and getting from here to there at way to fast a pace. It should take them days to weeks to learn most of this stuff.

Ok
Really wasn't expecting that

Bullshit
you've done a great job so far
you just gotta believe
please don't discontinue this

I liked

i cant' believe the Gap Youkai just will let another world be destroyed, specially one with magic.

Your story has a decent concept, but I'm more interested in seeing, with imagination of course, the interactions of the chars of interest with the Gensekyos. Like how some what more badass Seista will be she can fly and she can fight now. Louise isn't bad off it is a bit worrying if she doesn't become able to use Void magic now. She could end up learning about it by accident later though I can imagine it being when shes older now. Does Youmemi not have the seal of being Gandalfer? Well too bad for her she missed something rather important. I can only seeing this all in the end blowing up in her face and I can't help but imagine it.

This is good
believe in yourself
U must continue this
this may be a stupid review but i did this to encourage u

The Henrietta part was pretty good, although it's pretty short so the pace became a bit..bad because of that. I think you should make the paragraph longer and narrates their feeling or describe their interaction and such. For example the part where Aya talks with Ran you can write down their thoughts or gestures more than what you've wrote down. In the last two lines you wrote down "Aya said with disappointment.", but then you can write something like "she let out a small laugh while scratching her head. The news really didn't surprise her, but-" etc etc. From what I read it looks like you're in hurry to finish the chapter instead of letting it flows naturally. It might sounds like I'm just telling you to lengthen the fic uselessly, but some of the lines sounds like it doesn't have enough liveliness in it. You're not bound to 1st person POV so you can write down their thoughts freely

Also I would suggest not to abuse change of POV too often. It's making the story hard to keep up and coupling it with rather short narration for each POV, makes the building of any tension that you want to make to be completely disappear. For example I don't see any reason why you put Henrietta POV at the middle. It completely destroys my immersion for any tension before meeting Yukari and also makes Henrietta part to have less impact. For me, putting either Henrietta POV at the beginning would be better as I think it can make a powerful opening story while also connecting that with the previous chapter. You can then make the part where Louise wait for Yukari to have Helgekenians characters interact with each other (and by that I mean something like light-hearted teasing that brings smile or some discussion about the upcoming Yukari based on their individual perspective), to make each of them more alive instead of making them robotic.

Hopefully you can understand my point because I don't have confidence in stating my opinion clearly, so.. ;_; I'm not a good writer nor anyone important, but I hope some of these can make you rethink and improve your writing.

Anyway I think there's a certain charm in this fic. It feels kind of unique and it's another fic where Louise is the one who grows up rather than being a hanger-on for whatever she's summoning.

Well, maybe you should have killed the professor like you wanted.

So a minor god, uh?