Nokris is a Hive God and the former son of Oryx, The Taken King and he is the herald to the Worm God, Xol.
History
After Nokris was exiled by his own father, he traveled to Mars and shortly after his travels he was impriosoned by Rasputin. By the time the expansion Warmind starts Nokris and xol are free from Rasputin and had started to take over mars and finally destory rasputin. But The Guardian stops Nokris before that happens.