They say "evil" is a perversion of one's potential. As a result, a being of pure negativity can never be evil, because their negative nature is their legitimate purpose. The only exception is Dark Mind. He was supposed to bring death and destruction, but instead he decided to not be so nice. His only desire is to torture himself, and everything else in existence for eternity. As a result, he is the most vile, detestable, and truly evil maniac in the entire story. His voice should sound like Satan as depicted in Helluva Boss. A deep southern accent, with a gravelly voice.