Xerxes

Xerxes (クセルクセス, Kuserukusesu) is the emperor of Patala, the largest kingdom in the Southern continent of Tamas, the latter of which is also known as the Dark Continent (州の闇, Shū no Yami). Hailed as a god-like figure, Xerxes rules Patala with his dictatorial iron-fist and uses the element of mysticism, superstition and propaganda to elevate himself, this has led to him earn the moniker of Ruler of Heroes (英雄の王者, Eiyū no Ōja); though, it could also be partially credited to his no-tolerance policy, which led to him hunting down and personally slaying any "hero" who dared to defy him. Given his five year long conquest of Tamas and acquistion of over eighty percent of the continent, he was hailed as King of Kings (公達の王者, Kindachi no Ōja).

It is widely believed that Xerxes at some point was born in the Alvarez Empire and was a dark-mage, who fled the continent after wiping out the entire assembly of noblemen that attended to the Emperor.