Overlord Zetta is the (self-proclaimed) "Most Badass Freakin' Overlord In The Entire Cosmos" or "Overlord of all Overlords" and main character of Makai Kingdom. In his original game, Zetta was the most powerful Overlord in the universe (shown by the fact that he starts at level 2000, though late in the game it's revealed that his power is not entirely his own and the reason he became so strong was because Salome had been giving him all of her mana). After reading the Sacred Tome and learning that he, in his foolishness, just doomed his Netherworld to destruction, he objects to being called foolish and burns the Tome in a fit of rage. Only later does he realize doing so will destroy his own Netherworld, and he is only able to survive by trapping his own soul in the Sacred Tome, forcing him