After the battle of Telos, the 7 Representatives of the realms established the city of Arche in a buffer dimension, called the Ether Zone.

The Ether Zone connects all 7 realms, when the inter-dimensional portals aren’t sealed. In the middle of the Ether Zone’s void there is an island surrounded by a vast ocean, the waters of which fall into the void space, in the middle of which there’s the city of Arche.

The city of Arche was erected with the main intention of hosting the ancient ritual of Kabuji.