Orin is a golden Guardian Dragon of the realm of Edenia, who was ordered by Edenia's protector-god Argus to awaken his sons Taven and Daegon in Mortal Kombat: Armageddon.
Orin, however, stayed dutiful to Taven until the very end, when Quan Chi teleported to the cavern the brothers were entombed in and dealt Orin a mortal wound to prevent him from transporting Taven anywhere. However, Orin had just enough strength left after the attack to hold open Quan Chi's escape portal to Outworld for Taven, allowing him to chase after the sorcerer. His final fate is unknown, though the ending of the Konquest mode suggests that he died.
A female variant of Orin from an unknown timeline makes a brief appearance in Mortal Kombat 1 in the Khaos Reigns Story Mode expansion. She is kidnapped, tortured and held captive as a live trap in Titan Havik's chaotic timeline as part of The Maze. She later assists the Story Mode's protagonists by helping them escape and sending them to Havik's Citadel to stop his plans.