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. She was the female personification of the night, and a daughter of Chaos.

History
She was born directly from the void of Chaos, and was one of the first Protogenoi, and so was one of the oldest intelligent beings 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 one of the most powerful divine beings, as she was a Protogenoi, and is younger than only six other beings: Chronos, Ananke, Gaia, Phanes, Phusis, and Erebus. A myth that supports her power 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 - though there are many examples of this with other gods, such as Tartarus - Chaos did not exist and Nyx, in fact, was the first divine Entity, promoting her power and importance even more in some circles. Her son Moros(Doom) is even more mysterious, and is believed to be omniscient, omnipresent, and omnipotent, as he drives all things to their ends. One example is that Zeus cannot defeat him, another being that the Moirae(Fates) serve him.

Nyx's Children
Nyx had many children:

From Erebus:
 * Hemera (Day) In other myths she is sister of Nyx.
 * Aether (Upper sky)

From Partenogenesis (by herself):
 * Hesperides (Nymphs of sunset)
 * Thanatos (Non-violent death)
 * Hypnos (The sleep)
 * Momo (Satire)
 * The Moirae (Fate)
 * Apate (Deceit)
 * Ponos (Hard labor)
 * Moros (Doom)
 * Oneroi (the thousand personifications of the dreams)
 * Keres (fates of death)
 * Charon (Ferryman of Hades)
 * Philotes (Love and friendship)
 * Geras (Old age)
 * Nemesis (Retribution)
 * Eris (Discord)
 * Oizys (Distress)
 * Styx (Boundary between life and death. In other myths its daughter of Oceanus and Tithys)

From Cerberus:
 * Hellhounds