According to Rain's biography in Mortal Kombat: Armageddon, the Edenian race were descended from the gods themselves which was the reason for their longevity, nobility and strength. Among their deities was Argus and his wife, the sorceress known as Delia. Mortal Kombat 3 reveals that long ago, the kingdom of Edenia was ruled by King Jerrod alongside his wife, Queen Sindel with the royal family having a child by the name of Kitana around 10,000 years ago. During this time, the realm came under siege from the Outworld Emperor known as Shao Kahn who successfully merged with it after winning the Mortal Kombat tournament. In the wake of the invasion, Rain's father smuggled his son to safety whilst he continued his duty as a general in the Edenian army. This saw Rain's father being killed in the