Riz is the first and only son of Ruscion and Menelwen of the Xephiroth clan. His father was, some say, perhaps the greatest archer and tracker in Elfland. His mother was known to be like a shadow in the night. They both had a lust for tracking and defeating exceptionally strong enemies. Unfortunately Riz never learned any of this first hand. His parents were killed when he was only 2 months old trying to track down and kill a seemingly invincible opponent. The Tarrasque. No one knows if they were able to track down the monster. Yet, everyone does know that they did not return.
Thus young Riz was entrusted to his grandfather, Arbellason. He was secluded from almost all external influences. In this way his grandfather taught Riz all that he knew in the bow, stealth, nature and geography. Because of this Riz does not handle social situations very well because he is used to only talking to his grandfather. He also does not understand things such as racism which is why he was always confused when Balkaran insulted him. His grandfather also thought that such useless knowledge such as politics, mathematics etc. were not worth teaching young Riz.
When Riz was only 20 years old (a mere child to Elves) he was well on his way to gaining the title that his Father once had of the greatest archer and tracker in Elfland. This is perhaps how Vardis knew of Riz. Riz agreed to help Vardis in the hopes of gaining outside knowledge and quenching the same lust for tracking and defeating strong enemies as his parents had.