Ragnarok

Ragnarok, God of Darkness
Ragnarok is the God of Darkness in Umrbal Soul: Dark Rebirth, the rival and antithesis to the Goddess of Light, Lumielle.

Ragnarok was defeated by the hero Jeremy and his allies with the help of Lumielle 20 years before the events of Umbral Soul: Dark Rebirth. He wishes for nothing less than to bathe the world in everlasting night, and to crush Jeremy's soul, as well as the soul of any other would-be hero who draws strength from the Light.

Having been reduced to a shadow of his former self from the battle with Jeremy and the other Heroes of Light, Ragnarok was unable to enter the Human World for twenty years, until a small child's grief, anger, and exceptional gift for Dark Magic called to him; summoning him from the Underworld. Ragnarok spoke to the young child, convincing her to turn her back on humanity, on Light, and revel in Darkness. Ragnarok convinced the child to champion his name, to spread Darkness to the furthest corner of the world, to usher in a new age. An age of Darkness and terror. Corrupted by her pain and the rush of Dark Magic she had just unleashed (not to mention being an impressionable  child  Lianna agreed, and Ragnarok renamed his new herald. She agreed, vowing to visit her pain upon all followers of the Light, vowing to make them all disappear. On that day, Lianna died, and Pandora, Harbinger of Darkness was born in her stead.

Ragnarok, in game.
Though Ragnarok is a god, his powers are very diminished after being beaten like a redheaded stepchild by the Champion of Light, Jeremy with the Goddess of Light's aid.

Ragnarok is far from useless however, as he is the direct source of Pandora's magic. He also has the ability to sense other human's emotions, guiding Pandora to new allies to recruit, or enemies to kill.

 (Page is incomplete, will update upon completing more of the game and gaining more insight into Ragnarok)