Sonya

Name: Sonya Blade
Codename: Panther
Origin: Earth
Race: Human
Affiliation: FBI Special Forces
Playable Debut: Mortal Kombat
Unplayable Debut: N/A
Story: Lieutenant Sonya Blade was one of the best Special Forces officers in the FBI. Under the command of Major Jackson Briggs, or Jax, as his friends called him, Sonya went looking for Kano, a member of one of the most feared organizations known to the American government: The Black Dragon.
While following Kano, Sonya and her team followed an unknown boat to an uncharted island, where they were immediately ambushed by Shang Tsung's personal troops.
Sonya was brought before Shang and questioned at length. She demanded that he turn over Kano. He told her that if she and her team participated in and won the tournament, he'd free them and give them Kano. Then Liu Kang won.
In a rage, Shang Tsung had Sonya's team slaughtered and her captured. She and Kano were presented before Shao Kahn. Kahn took pleasure in making them watch the proceeding of his vile plot, to lure the Earth warriors into the Outworld to destroy them in his own Mortal Kombat.
Jax was one of the humans that Kahn meant to destroy. While Kahn was battling the other warriors, Jax freed Sonya and they made a bargain with Kano, saying that if he turned himself in, they'd free him. He agreed but, after they freed him, he escaped arrest and fled through the portal on his own.

Upon arriving back on Earth, Sonya and Jax pleaded the American government to take steps to prepare for the imminent invasion. Without sufficient evidence to support their claim, the government fired them and disregarded their claims. With the remaining sources they had left, Jax sacrificed his arms for bionic implants of liquid metal. Sonya took to finding better weapons for herself, and found a device that allowed her to shoot plasma rings. She had also learned from Liu Kang in the first tournament the ability to blow a flaming kiss at any target.
Before the invasion, Sonya and Jax tried several times to create a device that could form a portal to the Outworld. One was a device on the wrist that formed a purple sphere which they hoped to be a portal, but with several tests, they found that it collapsed on anything that entered it, crushing them. Sonya took it as a weapon.
Then the portal appeared, Sindel was reborn, and the Earth was stripped of all souls. Sonya and Jax were chosen warriors, so survived the initial invasion, and it took all their stamina and guile to live through the attacks of the extermination squads. Then, with Liu Kang and his allies, they planned the frontal assault on Shao Kahn.

Kahn was destroyed and the Earth returned to normal. With the recent attack, the government was only too eager to enlist Jax and Sonya's expertise. The two formed and ran the Outworld Investigation Agency. But Sonya, of course, went out on her original mission.

Sonya and Jax reported Kano's story of treachery, and the government took steps to make sure that situation never came up again. The Black Dragon was hunted down and exterminated, all except Jarek. Sonya left the OIA to find and kill him herself.
On her journey, she found that Jarek had traveled through the original portal into Edenia. Sonya followed and found Jarek, but also realized that Edenia was under attack, and they were stuck in the middle. Jarek and Sonya both ally with Liu Kang and now war with Shinnok and his dark minions.