Rain was originally meant to appear in Mortal Kombat 3, but didn't actually appear until Ultimate Mortal Kombat 3. Rain was originally a red herring inserted by the game developers; a character shown in the game's attract mode who did not actually exist within the game itself. A recent interview reveals that the insert was made by Ed Boon himself to intentionally trick players. Many MK fans searched for him in vain, with the eventual realization of his status as a joke character (named after a Prince song, "Purple Rain") dawning. The joke expands further when it is revealed that Rain is a "prince" himself.

Being the half-god he is, Rain wields immense power. Rain can control two things that involve weather: water and lightning. His powers being related to such, he is able to pressurize jet streams of water to either propel himself or slice his opponents like a blade. Rain's control over water and lightning is so powerful he can create storm clouds to block out the sun from the sky. He is most noted for his ability to trap opponents in a spherical prison of water that gives him limited control over their body. In addition, he is able to conjure up lightning blasts from the sky to blast his opponents into the air. He also possesses the ability to liquefy himself, turning himself into water and reconstituting behind them in a swift manner akin to teleporting. Through mysterious means, he enchants the strength in his legs, distorting space to strike them so hard that they would reappear opposite to his direction.

Skill Choice Rational:

"Control over their body."