Niflheim[]
Niflheim, also called Hell, is a realm ruled by Hild. It mirrors Heaven, to an extent, as it is both the home of celestial beings (demons) and holds one of the two computers that hold the universe together, Nidhogg. It is shown in the series that while goddesses can appear in Niflheim, they slowly lose their powers as Yggdrasil can't reach far enough into Nidhogg's territory.