Sareena/Original Timeline

Storyline
The demon Sareena first appeared in Mortal Kombat Mythologies: Sub-Zero as one of Quan Chi's personal assassins. She and her two partners, Kia and Jataaka, were ordered to kill Sub-Zero before he reached Quan Chi. They were defeated, but Sub-Zero strangely spared Sareena's life. Later, as Sub-Zero battled Quan Chi, Sareena suddenly appeared and helped him to defeat the sorcerer. After expressing her desire to escape the Netherrealm with him, she is shot in the back with a bolt of energy by Shinnok. She collapses into an enraged Sub-Zero's arms and appears to die.

It is later revealed in Mortal Kombat: Tournament Edition that Sareena was not killed by Shinnok's attack, but rather her human form was destroyed. Her essence was then banished to the Fifth Plane of the Netherrealm as punishment for her betrayal, where she would suffer for years. After years of being trapped, Sareena discovered the portal Quan Chi and Scorpion used to escape the Netherrealm shortly before Mortal Kombat: Deadly Alliance. She went through the portal and is transported to Outworld where she later discovered a way to restore her human form without Quan Chi's magic by absorbing the energy of the realm.

Shortly after regaining her human form, Sareena encountered the younger brother of the Sub-Zero she met years before. Feeling that he owed her for helping his brother, Sub-Zero granted her sanctuary with the Lin Kuei back on Earthrealm. In gratitude, Sareena pledged her loyalty to the clan, swearing to help defend it from its enemies.

In Mortal Kombat: Armageddon, it is revealed that Sareena followed Sub-Zero into the Netherrealm, saving him from being killed by Noob Saibot and Smoke. She and Sub-Zero were victorious, but after the battle, Sareena lost control of her human form and returned to her true demon self. Thinking her to be a threat, Sub-Zero attacked and she fled, not wanting to harm him. However, she was later attacked by Noob Saibot, Smoke, and her former master Quan Chi, who demanded she provide them the metallic item necessary to enter the Lin Kuei Temple. At first, Sareena refused, determined to remain loyal to Sub-Zero. But Quan Chi then cast his dark sorcery upon her, returning her to her human form and then convincing her that she can never be good and that she is simply a pure evil demon. Swayed by Quan Chi's corruption, she agreed to serve him once again.

In Mortal Kombat: Armageddon ' s Konquest mode, Taven encounters Sareena, still serving Quan Chi alongside Kia and Jataaka in the Red Dragon's lair. They battle, but all the three assassins are ultimately defeated by the half-god. However, Sareena was once again spared. After the battle, Sareena escapes Quan Chi's hold over her.

In her Armageddon ending, she defeats Blaze, causing his power to flow into her. She is left unconscious until Sub-Zero reaches the top of the pyramid and revives her. When she awakens, she realizes that she had gained the ability to freeze. She then confronts Quan Chi and freezes him in a block of ice. Sareena and Sub-Zero place the sorcerer in the Lin Kuei temple, where he will remain frozen forever.