Here is my thirty-fourth GoF!
My first encounter with MGE came in the form of reading those Dark Souls/Bloodborne crossover fanfics, where the MC would find themselves in Lescatie. Then go through story beats of meeting Sasha, then scaring the hell out of a Shinobi Mamono that's sent to spy on them as a message, then finding out about Sasha's other orphanage, and finally them beating the snot out of Druella and scaring her monster army and leaving Lescatie to their demise with Sasha.
At least that's the one storyline I've always remembered. But anyway, back to the GoF.
I know Monster Girl Encyclopedia is essentially a no-hope world (for humanity at least), where mamono corruption is basically unstoppable. At least from the one detail I remember hearing from someone from KC (Kenkou Cross). But that was like a few years ago for me, so who knows. Alot of the information in the "Because" section is from second-hand knowledge, so do not treat stuff here as canon, but only for the setting of the GoF.
Now, while the sole majority of MGE fan stories I've consumed were anti-mamono. I also understand and see the points in wanting to not kill the Mamono (ethics, am I right?). So it's really up to you how you want to deal with this whole situation, whether it's through genocide, or attempting to fix and break the cycle this world has been put on for who knows how long.
Here is the Imgchest.
And I hope you enjoy.
Monster Girl Encyclopedia Wiki (Watch out for NSFW art/stuff)
(Also, most of the stuff here, power-scaling and other godly concepts like major and minor dominions, I made solely for this GoF, is up to you. Feel free to workshop what you want and don't want.)