Nihil

Abyss is the Cosmic Deity of the Void and was mentioned by Azrael in the story: Highschool DxD: Til Midnight. He is stated to be the creator of the Ouroboros Dragon, Ophis. Currently, Abyss lives in the void outside all of Creation known as the Empty.

History
According to Azrael, Abyss came into existence at the beginning with his fellow cosmic deities, Eternity and Infinity. At some point, Abyss created Ophis.

Appearance
Abyss is stated to take the appearance of a humanoid mass of shadows with red eyes.

Personality
Not much is known of Abyss's personality.

Powers/Abilities

 * Creation: Abyss created the Dragon God, Ophis.