Echidnas is a D&D Planescape and anime monster girl inspired setting, Souls called patrons this a heaven or afterlife realm of the Planescape where a they go. Goddess of women and motherhood rules this world, the native residents of this realm are all female with no native men born. Elf girls are the ruling class living in cities and towns, Monster girls are lower class living as servants to the elves. Some Monster girls live as wild tribes. Some other are feral animals that will attack.