Emperor Zool is the dictator in control of Gishin and many other planets he has conquered. When Takeru was a baby, Zool took him from his biological parents and sent him to Earth, with the mission of destroying the planet when he's older. A cruel ruler, Zool has enslaved many people and inspired many rebellions. His ultimate wish is to control the entire known universe. Nobody can confirm if he is even human, because he is never seen without his mask and cloak... He is later revealed to be the god of death, ruling over the dead from a hellish celestial body called the Burning Star.