The Elyths are ethereal, biomechanical alien creatures that are the main antagonists of the Astra Tears series. Characterised by a humanoid appearance with pale skin and luminous veins, penetrating eyes and engraved geometric symbols, they represent a destructive force driven by cosmic energy. They act with fluid, hypnotic movements, floating among the ruins of the world, and their presence is often associated with chaos and total annihilation. They are both instruments and allies of Mio. 