Main Cluster

Overview
A Main Cluster, also called Universe Cluster, is a group of universes that are in different Reality Planes. Arguably, a Main Cluster is a 9D space, demonstrated by the fact that a body that resides in one of the universes doesn't know about the existence of another Reality Plane that exists at the same coordinates.

Only few people are allowed to travel in the 5th dimension. Generally, the ones who can voyage through the 5th dimension are the ones who own a Dimensionalizer and are able to coexist in multiple universes that are at the same coordinates at once.

When someone exists in multiple universes, they are able to do multiple things at the same time (for example, one may be doing 5 jobs if the amount of universes that are present at those coordinates but in different planes is 5. Generally, the amount of universes in the same plane variates from multiverse to multiverse).