Underground Emperor Zeba

Underground Emperor Zeba (地帝王ゼーバ Chiteiō Zēba): Zeba is the leader of the underground Empire Tube. He hates all human beings and is a master of the Dark Aura, desiring to turn the surface into a cold and dark place. His true form is the monster Lethal Doggler The 2nd (リサールドグラーII世 Risārudogurā Nisei) whose father, the original Lethal Doggler, is killed by the Igam Family for terrorizing the underground. Before dying, it spawns an egg that results in Zeba's birth; the child devours his parent to become stronger. The new Lethal Doggler grows with nothing on his mind but revenge, disguising himself as Zeba and rule the Igam Royal Family. Upon assuming the throne, Zeba corrupts the underground into a violent kingdom and enslaves the underground humans.