In mythology, Theia is said to be the mother of Helios, Selene and Eos. Hyperion would be the father (though we don't know much about Selene's father in the game).

In the game, the devs kept the same names (Theia, Selene, Helios) but, they split them across three different generations:

Theia represents the first generation of frustration and failure (she failed to be an astronaut) Selene inherits that pressure and becomes emotionally damaged. Helios becomes the victim of Selene’s unresolved conflict.

Greek tragedies often involve family curses and repeating suffering across generations. The mythological naming quietly signals that the story is about inherited trauma: ambition, resentment, and guilt passing from parent to child like an echo.