Dark Realm

The Dark Realm, also known as the Demon Realm, is the former residence of Jahy. It was destroyed by Kyoko Jingu, causing Jahy and the rest of its inhabitants to lose their powers and fall to the Human Realm.

Description
The Dark Realm appears to be a darker reflection of the Human Realm, with no sunlight, a red moon, and withered black forests and mountains surrounding the main castle. The castle itself is made of dark brick and appears to be the main area of civilization within the realm; it's large enough to shelter a lot of people, and lords and peasants both reside within its walls.

The castle is also the base of the large mana crystal that supplies the Dark Realm's residents with power. Other known areas include the throne room where Jahy often sits, and the bathing area.

History
At some point, the Dark Lord and Jahy became the No. 1 and No. 2 leaders of the realm.

Later, the castle's mana crystal is destroyed by a Magical Girl, causing the realm to crumble and the demons living within it to be transported to the Human Realm.

Lords

 * Dark Lord (No. 1, former)
 * Jahy (No. 2, former)

Others

 * Druj (No. 2's aide, former)
 * Saurva (Former)