How'd a mortal find their way in here?

Well, I'll just tell you what this place is.

This is LIGHTSTARIUS, the dimension above the Universe. Here this is where the Star Deities remain.

I'm Avaci, the Deity of Life, Peace, and Space. This is where my domain remains.

Etoile is the watcher of the Hollow and the Deity of Rebirth and Peace. Here is their domain.

And Nova... hmm. They were the previous Deity of Space. Their domain is here.