According to Hesiod, Hemera lives with his mother, Nyx, beyond the Ocean, in the far west. There, a great wall separates the gates of hell from the visible world. Behind the wall, a grand palace rises imposing where both reside, but are never seen together. When Heméra leaves, the mother waits until it is time for her daughter to return, in turn, to greet her and go out to cast the mantle of night over the world. When Nix returns to the palace, he greets his daughter and gives her permission to go out with Hélio and the Hespérides to light the land until late afternoon, and the cycle begins again. As Hesiod says, "the palace is never closed with both".
Heméra has great beauty, not as great as Aphrodite's, but enough to be considered also a goddess of persuasion and lies, who through cunning can manipulate mortals as well as other gods with some ease. It has also always been associated with the god Apollo and could even be considered as "brothers at heart", since Apollo is considered a morning solar deity.
In the book The House of Hades, from the Heroes of Olympus saga, written by Rick Riordan, Heméra is mentioned as a daughter by Nix.