The ibis-headed Tethru are a detached and enigmatic race who are obsessed with the learning of old lores and the discovery of new knowledge. Their narrow heads are brilliantly plumed with soft feathers of pure whilte, soft violet or sky blue. Their skin is a ghostly alabaster, and so pale that their thin blue veins are visible beneath its surface. Their slim-limbed bodies are tall and ascetically lean. From their lofty height, implacable eyes stare down, impassively judging those before them. The Tethru are aloof and ethereal and seem far removed from this world.