This entity wasn't originally part of the "Hub"... it took it over eons ago before the first arrival. It was said to be take by force, starting with the defence mechanism of which he used to eliminate the precursors... a literal genocide.

He possesses immense powers over all entity entering the hub. Time itself is only a play toy for him. He sees all...

The Narrator wasn't always in this form. At his first encounter, it was said to look like a small shadowy avail with a red aura, eye lines determined by bright red segments, same goes for his mouth. He was able to convince the precursors we wasn't here to fight... until the very moment of their betrayal...

It seems as if he brought Rala in first for a reason... the which is still unknow to this day...
After he sent back everyone... he locked himself back into the main room... grieving the lost of his toys...