Fiore/Deblanc origins.
Just curious, I haven't read the comic book, but isn't there at least a hint of evidence that Fiore/Deblanc are the fathers of Genesis? Deblanc mentions to Fiore in episode 9 the he doesn't know what hell is like, and it's clear that they are lovers based upon everything shown up until episode nine, so isn't it likely that they are the demon and angel that created Genesis and as punishment they were made it's custodians?
There has been no demons on the show, and in most lore, demons have pretty much the same powers as angels, so it doesn't seem that far out of line to suggest that they are Genesis parents (which is why they know a lullaby to capture it and act parental towards it when they did capture it)