That "someone" is the closest we have to any links to God. He's some guy who programmed the system. We don't actually know who he is, but he's hidden amongst the NPCs because he's caught in his own system.

The purpose of this place is to act as a place for us to get over our regrets. You do that, you accept your life, and you'll disappear. [ There's a brief tone change that indicates she's not.. exactly sure about that anymore. ]

That's what's supposed to happen anyway.