Thespa is one of the Avalar. She is the wife of Ereus, and is associated with dreams, prophecy, the moon, and the night sky. Her form is that of a beautiful woman, tall and lithe, with long black hair, and eyes like silver starlight.

Thespa is revered most in the realm of Arcaneum, where the humans there, like the Terethian elves of old, share a reverence for the moon.