Acheron — the Underworld, a deep pit and a realm of shadows where demons and the fallens gathered.
Terrans, formerly known as humans, believed that it's an afterlife place where evil souls and sinners pay the penalty for their crimes. It is a place where eternal suffering and unending punishments for the wicked after death.
Some believed that it is a humongous, smoky land surrounded by fire, filled with an indescribable and suffocating smell where demons and monsters lived.
Demons are supernatural entities, associated with evil or malevolent spirits which most of the time influence Terrans to act viciously.
Monsters were creatures of the underworld, usually described as scary and with hideous appearances.
But for those who were born and raised in Acheron, it was their home.
Elisia grew up with her two hundred siblings, aware that the time would come when they would enter the realm of the mortals.
