An: this is basically the two deities from Overlord of Kingdoms.

Name: Alina
Role: Deity of Light.
Age: unknown.
Appearance:

An: I don't own the art so give credit to the artist from animo.

Powers:
Everything involving Light.
Omnipotent.

Background:
She was born from the light of people hearts. Since then she became the light that protect children.

Name: Araphel.
Role: Deity of Darkness.
Age: unknown.
Appearance:

Powers:
Everything involving the Dark.
Omnipotent.

Background:
He was born from the dark of people hearts. Since then he became the dark that devour the light.

Both background:
First was Araphel who immediately notice that the people, who hearts are fill with darkness, are so dark that it cause him to turn them into darklings. He continues turning those with dark hearts into darklings bit. But after encountering Alina who defend a child, who heart is fill with light, he change his goal. He will devour every world of light to destroy Alina. However Alina goal also change to defeating Araphel from devouring everything. Causing the Great War in Kingdom Hearts.