Rain

"I am a son of Argus! I was not merely declared a god by befuddled commoners, Buluc."

- Rain to Kotal Kahn about their godhood "I am no friend of yours. I am Rain, a prince of Edenia."

- Rain to Taven in Mortal Kombat: Armageddon

Rain is another son of Argus, half brother to Taven and Daegon, and an antagonist from the Mortal Kombat series of fighting games.

Early Life
Rain was born in Edenia and when he was very young, he watched as his realm was invaded by Shao Kahn and the forces of Outworld. As chaos enveloped the realm, he was smuggled away at the behest of his adopted father, a general in the Edenian army who stayed behind to perform his duty. However the realm's forces were crushed and Rain's father was killed by Shao Kahn.

Mortal Kombat 3
Millennia later, Rain resurfaced during Shao Kahn's invasion of the Earthrealm, but was attacked by the emperor's extermination squads. He was given a choice, fight for Kahn or die, and chose to join Shao Kahn, either out of fear or ulterior motives, turning his back on Edenia. Rain fought against Earthrealm's forces, until Kitana confronted him and told him that Shao Kahn had killed his father. Enraged, he turned on the emperor and embarked on a mission to bring him down.

Mortal Kombat: Armageddon
As the final battle of Armageddon drew closer, Rain found out about his true origins from Quan Chi, an emissary of Shinnok who told him that his true father was actually Argus, Edenia's protector god. He began to refer to himself as prince of Edenia and continued to fight on the side of evil. Rain sought to kill his two half-brothers, Taven and Daegon, and then claim the ultimate prize and power promised for defeating Blaze. He eventually tracked Taven to Artika and fought him, only to be defeated and disappeared in a watery portal.

In his ending, Rain was revealed to be Taven and Daegon's half-brother and Argus had tried to keep his identity secret. He defeated Blaze and gained full godhood with Argus declaring him the new Protector god of Edenia. But Rain instead used his power to enslave the realm of Edenia and due to Argus' position as an Elder God, he could not do anything about it.

Mortal Kombat (2011)
Rain is a playable character in Mortal Kombat (2011), his backstory as an Edenian orphan is still retained but it was revealed that he was taken as a refugee by the Edenian Resistance. While he fought for them and quickly rose the ranks, his arrogance grew along with him and when he demanded leadership of its forces and was denied, he willingly betrayed his realm for power by allying himself with Shao Kahn who promised Rain leadership of his own army.

In his MK9 ending, Rain defeated and crushed the Edenian Resistance, but was later denied of his own army by Shao Kahn. He then drowned the Emperor in his own blood. The thunder god Raiden was impressed, he then took Rain to his old home of Edenia. While there, he shown Rain the source of his origins when they approached the ancient statue of Argus, a god of Edenia who was Rain's biological father. But with his divinity confirmed, Rain's path was clear: he would later assemble and lead a massive army of followers including those of Shao Kahn's milita to not only take over Outworld, but to conquer all the realms including, to Raiden's surprise and horror, Earthrealm as his first target.

Mortal Kombat X
After Shao Kahn's death, he allied himself with Mileena alongside Tanya, waiting her to die by the prolonged use of Shinnok amulet and then claim the throne of Outword.

He later fought with Kotal Kahn, but he ended up defeated and was forced to escape. Rain reappeared fighting and trying to kill D'Vorah. However, D'Vorah defeated him, and was about to kill him and Tanya. However, Cassie Cage stopped her, sparing them. After losing to D'Vorah, Rain is not seen again.

In Tanya's arcade ending she betrays Rain and hands him over to Kotal Kahn who kills the male Edenia.

Powers and Abilities
Rain is a skilled fighter and possesses great power due to being a demigod. However unlike the other sons of Argus, Rain does not control fire, he can manipulate water and lightning. Rain is able to fire a powerful blast of water from his hands or feet that he can use to propel himself forward or to blast opponents, call down a lightning bolt on his foe, fire an orb of water that allows him to stun his opponent and move their body around, and submerge himself in water then reappear behind them. Rain can also perform a powerful roundhouse kick that knocks the opponent to the other side of the screen.

Trivia

 * Rain appeared in the animated series Mortal Kombat: Defenders of the Realm, Rain was once engaged to Princess Kitana, causing tension between him and Liu Kang before he was revealed as a traitor. He also had a former relationship with her in the TV series Mortal Kombat: Conquest.
 * Despite Rain being considered somewhat of a joke character due to his pointless role in the arcade games and having only a few appearances, he has a large number of fans.
 * Rain appears in the Dark Prison stage of Mortal Kombat: Deception along with many other characters. He also appears in the Konquest Mode and if the player speaks to him, he asks them to find an ancient Shokan Dagger.
 * Rain was based on the late singer Prince.