Demon King | Caver

From I'm not that kind of talent.< Caver is the Demon King, an existence created by the world to kill the hero. Because he is a being that can only be killed by a hero, he has mastered all weapons techniques and arts due to his long life. The appearance of the Demon King is based on humans, the only difference in appearance is the black sclera. He has short black hair, but it is said that in the past his hair was originally long. He recruited Deon Hart - the person he misinterpreted as Demon Arut - to become Zero Corp's expert captain after witnessing Deon "kill" the Hero.