Born 595 ATA to Oren Nillu and Eris Kahar, Rayk was the younger of two sons of the Imperial Chamberlain. Growing up at Glittering Bear Keep with his cousin Damiante, thus began his training of a Nillu nobleman. Soon after attaining adulthood, he came under the employ of Warlan Lomasa and his wife, Damiante Nillu, and took over as Steward of the Hawk's Aerie Township. Soon after the tragic death of Warlan Lomasa at the claws of wildlings, Damiante passed Baronship of Hawk's Aerie to Rayk Nillu.