Orin and Caro are the two anthropomorphic, guardian Dragons of the realm of Edenia who are ordered by Edenia's Protector god Argus to awaken his sons Taven and Daegon in Mortal Kombat: Armageddon. Orin the "Gold Dragon" is assigned to Taven and Caro the "Red Dragon" is assigned to Daegon.

According to the game's Konquest mode, Caro somehow lost telepathic contact with Blaze sometime shortly after the two brothers were entombed, and, mistaking this for the signal the fire elemental would use as the call to Armageddon's arrival and the beginning of their quest, awoke Daegon prematurely. Daegon, enraged at the trickery of his parents, seemingly killed them and enslaved Caro, using his name and likeness as the basis for the Red Dragon Clan. Daegon also used his ability to create portals to transport his troops anywhere in the realms, and his DNA to create a race of half-human dragon creatures. He was freed from his servitude by Taven, and despite his weakened state, took his revenge on Daegon by destroying his precious Red Dragon clan and headquarters. His final fate is unknown.

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 to Konquest mode suggests that he has died.