I'm bored as hell, let's talk hypotheticals.
Let's say that, for some damn reason, the Hakurei barrier breaks, you can say it's the Lunarians going Lunatic mode and say fuck all to the balance of the world, some crazy, angry Youkai God or Yukari just fucking with the residents (both are basically the same thing but you get me, you're a smart...individual), how would this pan out?
Of course, you can say "Oh, the Outside World's gonna go extinct because of the wild Youkai!" or "Oh, all Youkai would starve from the lack of faith/fear!", but I want an *actual* answer that's not just a cheap copout, so...let's think about it.
We all know how Gensokyo works, it's a magical place (not a secluded dimension iirc, so y'know, it's not the cliché Isekai shit) where the forgotten creatures of old reside! And y'know, also humans but fuck them, whatever, how it works is that, 1800-ish years ago, the 3 Sages came, did some barrier, and invited Youkai, now the thing here is that...well, if you think about it, any "mythological concept" can realistically work.
I mean, what are "Youkai" in the context of Gensokyo? Most of them are either races taken from Japanese Mythology (Tanukis, Kitsunes, Kappas, etc...) or ACTUAL concepts taken from Japanese/Japanese resident mythology (take the MoF goddesses F.E, both of them take some stuff from lake Suwa and the things that are around it), sure it's not a 1 on 1 copy, but it wouldn't really be tasteful for the Japanese audience, now would it?
Anyways, what I'm trying to say is, Gensokyo is basically a huge gathering of "faithless" concepts, basically how it goes is "Concept is in the Outside World > faith dwindles due to X reason > they 'die' > Gensokyo"
So, take the idea into literally any other concept, and boom.
Now you might say "Oh, but why isn't there any other concepts in Gensokyo appart from East-Asian mythos?" It's simple...
ZUN doesn't give a shit (I know, lazy answer, but c'mon...)
okay seriously though, it's just that ZUN makes shit ambiguous, and one of them is well...this entire discussion.
Whatever, where am I going with all this? it's simple, way I see it, we're getting a Shin Megami Tensei scenario, if you don't know shit about the series, lemme give you the rundown...
Demons from all mythos are somehow in the real world, depending on the games you have a "Demon summoning program" (DDS for short), basically lets you recruit demons, talk and negotiate with them, yada yada...
How the world WORKS is different in most games, but the common thing is that humanity is getting the short end of the stick, and you have factions for the demons, Chaos, Neutral and Law as an oversimplification.
so, how I see it is, once this barrier goes down, it's gonna be complete chaos for the next few days, y'know everyone fighting each other...
the catch is, the Youkai we see in Gensokyo are much more civilized than...well, demons.
so, after all the chaos dwindles, humanity doesn't get killed or simply "enslaved", they basically become bargaining chips and life sources for the Youkai.
let's just group each "faction" and try to...quantify this shit :
>Law : Well, it's not that simple, but how I see it, it's not just gonna be A God, but more like a council of Gods, or in this case Goddesses, you can put most Goddesses with an actual following in this category; Keiki, the Moriya girls, etc...
>Neutral : These are gonna be the normal, but not generic Youkai, they're gonna work more with fear than simple faith, but we'll see how it'll work
>Chaos : These...are basically New Hell, basically take the Yakuza BS they made, and boom!
That's how I see it work, I'm really curious to hear from y'all, and y'know, if you agree with this schizo rambling at 3AM, you guys can put some characters in this "faction" system.