I know a great deal. Considering my role here.
I suppose to explain my relation to the one you call "Migrant," I should start with my own role.
As I said, these stars are other worlds throughout the multiverse. Each star is a core, or a heart, however you would like to imagine it. I am one of many beings who creates these cores.
I had actually just finished one when you arrived.
The multiverse is continually expanding, so it must continue to be filled with new worlds. I create a core here, and cast it out into the ocean to take its place where it may. An to become whatever it may.
Other beings might try to take a more active role in the worlds they create, but I'd rather keep my involvement at a minimum.
However, as you saw, there is also Darkness in the multiverse. Swallowing any world in its path. To combat that, I created "attendants" if you will, using discarded pieces of worlds. Three of them, in fact. One of whom, Michiko, eventually became the person you call Migrant.
OOC: Whee it's 3AM sorry if that came out weird.