Mortal Kombat 4 - Character's Bios
Kai, Raiden, Shinnok, Liu Kang, Reptile, Scorpion, Jax, Reiko, Johnny Cage, Jarek, Tanya, Fujin, Sub-Zero, Quan Chi, Sonya, Goro
Kai
A former member of the White Lotus society, Kai learned his skills from the great masters throughout Asia. He journeyed to the far east after meeting his friend and ally, Liu Kang in America. Now, they reunite to assist Raiden in his battle with Shinnok.
Raiden
The god of thunder returns to Earth after the defeat of Shao Kahn - but finds a new threat when Shinnok's forces led by Quan Chi attack the Elder Gods. With the heavens in disarray, Raiden exists as one of the last gods of Earth. He must come to the aid of his elders and put an end to the villainous reign of his ancient enemy.
Shinnok
Banished to the Netherealm for crimes committed against his once fellow Elder Gods, Shinnok is freed from his confines by Quan Chi. With the aid of a traitor he then is able to overtake the realm of Edenia. From there he wages a war against the Elder Gods and awaits a chance to enact revenge against the god who banished him there - Raiden.
Liu Kang
Still the immortal champion of Mortal Kombat, Liu Kang finds himself venturing into the realm of Edenia to rescue the princess Kitana from the vile clutches of Quan Chi. Unsuccessful in his mission, Liu returns to Earth and mounts an effort to bring together Earths greatest warriors. He does it this time not only to free Kitana's home world but also to assist his mentor and Earth's protector - Raiden.
Reptile
A general in Shinnok's army of darkness, Reptile once belonged to an extinct race of reptilian creatures. He was banished to the Netherealm for committing genocide against several species. Responsible for the death of millions, Reptile is a dangerous ally to the forces of evil.
Scorpion
In hopes of gaining Scorpion as a new ally in the war with the Elder Gods, Quan Chi makes the dead ninja an offer he cannot refuse - life, in exchange for his services as a warrior against the Elders. Scorpion accepts, but hides under ulterior motives.
Jax
When Sonya disappears while tracking the last living member of the Black Dragon , major Jackson Briggs heads after her. He soon finds that Sonya's mission has led her into a battle with the forces of an evil Elder god. This is a battle they must win or their own world will crumble at the hands of Shinnok.
Reiko
Once a general in Shinnok's armies, Reiko lead the forces of darkness into the battle against the Elder Gods. Once thought killed during that onslaught, he resurfaces and joins the battle against Earth's forces.
Johnny Cage
After Shao Kahn's defeat Cage's soul is free to leave to a higher place. From the heavens, he observes his friends once again engaged in battle. When he learns of the war waged against the Elder Gods by Shinnok, Cage seeks out Raiden to help him restore his deceased soul and join Liu Kang in his quest. Once again, Johnny Cage finds himself fighting alongside Earth's warriors.
Jarek
Believed to be the last member of Kano's klan, the Black Dragon, Jarek is hunted down by special forces agent Sonya Blade for crimes against humanity. With the emergence of a much greater evil, Sonya focuses her strength on the new menacing Quan Chi. Jarek now finds himself fighting alongside Sonya and Earth's warriors to help defeat the evil Elder God, Shinnok.
Tanya
As the daughter of Edenia's ambassador to the new realms, Tanya invites a group of refugees fleeing their own world into the safety of Edenia. But soon after queen Sindel allows them through the portal, she learns that one of the warriors is none other than the banished elder god, Shinnok. The portal leads into the pits of the Netherealm itself, and the once free realm of Edenia is new at the mercy of Shinnok.
Fujin
Better known as the God of Wind, Fujin joins Raiden as one of the last surviving gods of Earth. Their counterparts were defeated in a war of the heavens between Shinnoks forces and the Elder Gods. He now prepares for the final battle between the forces of light and Shinnoks hell - spawned warriors of darkness.
Sub-Zero
After Shao Kahn's defeat at the hands of Earth's fighters, Sub-Zero's warrior clan known as the Lin Kuei is disbanded, but with the new threat brought on by Quan Chi, the ice warrior once again dons the familiar costume once worn by his brother, the original Sub-Zero. He also holds secrets passed on to him by his sibling - secrets that could hold the key to stopping Shinnok.
Quan Chi
A free roaming sorcerer, powerful in the black arts, Quan Chi uses his abilities to free the now evil Elder God Shinnok from his confines in the Netherealm. In exchange for his services, Shinnok has granted Quan Chi the position of arch-sorcerer of his now expanded Netherealm.
Sonya
After her journey into the Outworld and Shao Kahn's near destruction of Earth, Sonya becomes a member of Earth's own Outworld investigation agency. Her first mission leads her to join Liu Kang on his quest to aid the troubled thunder God, Raiden. She must survive long enough to warn her government of the new menace brought on by Quan Chi.
Goro 
The half human dragon stood as Shang Tsung's protector in the first tournament. Goro took the Mortal Kombat title from the original Kung Lao, only to have it won from him nine generations later by Lao's ancestors, Liu Kang. Seeking revenge, the Shokan prince has returned from the Outworld to crush Liu Kang in Mortal Kombat.