The Hells are a group of extremists who are against the existence of the Warpland. They are the people of the country of Galoum: the protectors of the Sacred Forest. 

Being that they are the only ones not infected by the LEUP in the Qafurian continent, they have taken this opportunity to eradicate the rest of the infected population. It is their belief that sustaining the Warpland is unnatural, and the Sacred Forest is trying to restore the balance by spreading the deadly LEUP.