Erebus

Erebus is a Makaio residing and ruling on Helios.

History
Erebus was a Shin-jin before the creation of the Universe, back when the Void was the only thing beside the planet. Erebus wanted to abuse this early chaos, to build the Universe in his image, so he convinced his fellow Shin-jin to help him overthrow the First Kai, the most powerful being in existence. He created demons and monsters, the first to exist, to help in his plans. He started the Great Demon War, deeming himself the Shadow God King, he killed many Shin-jin, and many Kaiju, World Trees the birthplace of Shin-jin, eating their fruits and becoming immortal with their powers. Until, the first four Supreme Kais was born from the final tree, along with the First Kai giving all his energy to their attacks (dying in the process), defeating and destroying Erebus. The Supreme Kais added order to the Universe, creating a prison for the traitor Shin-jin and their demons, Hell. Erebus was too powerful and treacherous to be locked up in Hell with other demons, so they tricked him into Helios, claiming it was a portal to Hell. He is now trapped there, guarded (rather terribly) by the Greys, all his possible hosts killed by the monsters living there before he could possess them, until the saiyans arrived.

Abilities
Erebus was godlike in his original form, he could be in new hosts if given enough time to adjust to them. Erebus can kill almost everyone in seconds. Erebus' normal power level is a Googolplexian, however, his power in a possesed form is a mere 20,000, which starts to grow the longer as he has the possessed form. He can possess people to take over their bodies.

Personality
Erebus is sociopathic, and wishing to destroy the entire universe, not caring for any lives lost.