Aether
primeval god of the upper air
Believe it or not, but the gods (and their parents, the Titans, before them), breathed a special and purer air up on Mount Olympus than the puny humans down on earth did. The god who handled the production and existence of said air was another one of those mysterious early Titans who were born in the very first moments of existence.
His name? AETHER, elemental god of the upper air that the gods of Olympus breathe. These days we'd call it the upper atmosphere. He was the son of Erebus (Darkness) and Nyx (Night).
Aether was the personification of the upper air, or the air of the gods. He was also the personification of the bright light that shone from his sister, Hemera, goddess of daylight.
According to legend, during the daytime, Aether's bright body shone all over the world. But at night, Nyx came out of her home in Tartarus and drew Erebus over Aether to cover him up.
Erebus would make it night time and Aether would be covered up. After Nyx went back to her home, Hemera would emerge and scatter Erebus to let Aether show and let it be day again. As a fairly obscure god (or perhaps Titan?), Aether doesn't get much in the way of stories, but as things go, the Greeks had a god for just about everything and Aether did his part.
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