Do you know what my name means? 
"Helia" comes from "Helios" that means "light" in greek; in the past it was the name of a greek god: he was the god of the sun, later on the name "Apollo" replaced it...
"Nyx" is a greek goddess, but not a usual one: the main gods are the most powerful ones; their kids are a bit weaker and kids of the kids have even less power and so on...
Nyx is the daughter of Zeus, the king of the gods, but nevertheless she is stong, too strong for a not-main-god. Even Zeus king of gods and her father is afraid of her. She is the goddess of the darkness, the shadow, the night & co.

So my name represents opposites: darkness and light, black and white, life and death.

-Like Yin and Yang.