Nyx

Nyx was the ancient goddess of Night. She is a shadowy figure in Greek mythology but from the extracts about her, it can be gleaned that she was a figure of great beauty and power.

History
She was born from the giant cosmic being called Chaos. She was the first born Protogenoi, so was the oldest intelligent being in the universe as Chaos did not have a consciousness. She was married to Erebus (Mists of Darkness) and had many children with him. She is considered the most powerful divine being, so most powerful being in the Greek universe as she was the firstborn. A myth that supports this is when Hypnos, the minor god of sleep and her son, fled Zeus because he put him to sleep on Hera's orders, so she could give great misfortune onto Hercules. Zeus found out about his involvement and chased him. Hypnos fled to his mother Nyx whom Zeus obviously feared as he held his anger at bay, not wishing to offend Nyx. Another myth is that Nyx's daughter, Hemera (day) left Tartarus when Nyx entered it, creating night and day. According to some greek articles, Chaos did not exist and Nyx, in fact, was the first divine Entity, promoting her power and importance even more. She is all powerful as everything eventually succumbs to the night.

Nyx's Children
Nyx had many children:

From Erebus:
 * Charon (Ferryman of Hades)
 * Nemesis (Retribution)
 * Styx (Boundary between life and death)

From Partenogenesis (by herself):
 * Keres (Fates of Death)
 * Eris (Strife, Spite)
 * Phanes (Procreation)
 * Hesperides (Love or harm) not to be confused with the Nymphs

From Ceberus:
 * Hellhounds