The Secondary Realms(created by, wait for it, The Creator) are systems that exist in spaces that are connected to the Primary Realm (the Solar System) through a complex network of portals collectively called “The Portanexus”.
It is mostly the Secondary Beings (non-humans) who can can open and use these portals to traverse throughout the different realms. Until the end of the Utopia Lost Battle, human beings were unaware of these different universes until the Terra Warriors, earth angels and demons, opened the sealed Portanexus pathway that The Creator locked off from keeping the human race from interacting with these other realms and vice versa.
Later on, a group of people called Linians, followers of a man called Linkera, discovered the planets that served as pathways to the various realms and named them to keep an eye on the other realms.
The Secondary Realms and their gates are as follows:
* * * *
and the eventual two “Undiscovered Realms”:
Seara Karr
Torimaru
The Book of Events: Version 1.0 