Well I couldn't specifically find a greek goddess of chaos and darkness but I did find two similar.
The Greek Goddess, Nyx (also sometimes called Nox), the Goddess of the night, was born from Chaos. Her siblings include some of the oldest deitys in Greek mythology, such as Gaia (earth), Erebus (darkness) and Tartarus (the underworld)
chaos was goddess of air
She is the goddess of Chaos.
There are two minor goddesses which fit in the category... Eris: goddess of discord, strife, and war Ate: goddess of impetuosity, guilt, delusion, and folly But no, there is no specific goddess of evil.
There is no word in the ancient Egyptian language that corresponds with the English word chaos.The word for "confusion" is spelled in hieroglyphs as stnm (vowels were not written).
Eris. (fnord.)
Erebus's sacred animal was Charon. He is the son of Chaos and the brother of Nyx. Erebus is the god of the shadows and darkness.
Chaos was the first primeval goddess to appear at the creation of the universe.
The primordial God Erebus (Έρεβος) meaning darkness. Son of Chaos.
Chaos, being alike to air and mist, parts the earth from heaven in ancient Greek myths; it was she who brought forth Darkness (Erebus) and Night (Nyx) who together would bring forth Day (Hemera) and bright Air (Aither); they in turn brought about Heaven (Ouranos), Earth (Gaia), and Sea (Thalassa). So it is that the accomplishment of Chaos is everything: night, air of darkness, day, bright air, heaven, earth, and sea.
Eos is a gentle goddess who sometimes forgot her duties.
I believe your talking about the Roman god of death which is Pluto, also known as Hades in Greek mythology.A:The Roman goddess of the night was known as Nox; the Greeks called her Nyx. Please see the attached link.