 Var and Neena most likely belong to which group:
But its outward perils could not compare with the Ryzgas themselves, who slept within, ready to wake and conquer.... Var said, "The Watcher's cave should be three miles beyond this pass." Var sensed her fear, and the love that had conquered it. For the flame that had sprung between them at the Truce of New Grass, she had challenged the feud of their peoples and had left her home, to follow him. Now, if her father and his kinsmen overtook them, it would be death for Var, and for Neena living shame. Which of the two was worse was no longer a simple problem to Var, who had grown much older in the last days. While she waited he spun a dream, attaching it to the crags that loomed over the pass, and to the frozen ground underfoot. Var eyed the ice-curtain closely to make sure that it was real, not dream-stuff; then he struck it boldly with his fist. Var saw with some surprise that all the walls were sheathed in ice—warm to the touch, bound fast against melting by the Watcher's will. Behind them began a tinkling of falling water, thawed from the glacial ridges above to descend sheet-wise over the cave mouth, freezing as it fell into lengthening icicles. Hot food and drink were before them almost at once. Warming to the old man now, Var sketched his and Neena's history briefly.
 Descendants of the slaves of the Ryzgas
 A mutated strain between the slaves and masters of the Ryzgas  Descendants of the slaves of the Ryzgas  Members of an alien group that destroyed the Ryzgas  Descendants of the Ryzga masters