The Monster King is the ruler of the most powerful continent in the Monster Realm. He is the father of the Monster Princesses as well as the third Monster Princess who he abandoned on the planet Teral.
Although he is not fully seen outside of Everett's memories he appears to be a gigantic humanoid with long hair and dark skin.
The Monster King is described by other Monsters to be one of the most ruthless, bloodthirsty, and cruel Monster in the entire realm. While this was true for the most part, he was not incapable of being compassionate as seen when he left the third Monster Princess on the planet Teral and erased her memory so that she could live a new life unaware of the abuse and torture she went through.
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