Nyx , spawn of Chaos – mother of The Ether.
Nyx holds a powerful influence in Greek Mythology as one of its Key Creation Dieties. She was born of Chaos and bore all that which is key to mankinds exsistance.

Quick Referance

Creator :

Spouse : Erebus

Siblings :

Progeny :

With Erebus : Aether – Atmosphere (air)
                                    Hermera – Day (light)
While Hermera is first mentioned as Nyx’s daughter, she later transforms into her sister in later writings.