Luminous Netherworld

The Luminous Netherworld is some sort of underworld located in a frozen planet at the edge of the solar system Pyrhithya is in. It is where souls go after death.

Inhabitants
Death Reapers-They take souls

Trivia

 * Netherworld is a common way to describe a land of Demons (or reapers, in this case) and death, and luminous is a reference to the fact that it is under influence of the light.
 * It was mentioned that the afterlife is known as "Mortis". The relationship between Mortis and the Luminous Netherworld has not been stated.
 * Either this or Mortis or both, or neither, is called "Prekt's Realm."