[Fortuna]: Luck depends on no one....right? (4/3)

I'd like to know more about the Singer and the Mirage.

Unrelated to the Limbo Gods but can the game make a shopkeeper immortal just for the sake of them being the obligatory recurring shopkeeper? Because if not there's a certain Noxis-Noverum that has not only gone 200-some years without any apparent aging but also has appeared in our achievement shop.

I wonder if he's Hades in disguise.