Katerea Leviathan was one of the three leaders of the Old Satan Faction, being the descendant of the original Leviathan. She despised the current Satans as she believed they were defiling the name of Satan. She desires to cause chaos and destruction to the world. Excluding Vali, the descendants of the original Satans believed that the current Devil system was wrong. In order to change this, they wanted to kill the current Satans and take control of the Underworld.