Sonya is a member of a top U.S. Special forces unit. Her team was hot on the trail of Kano's Black Dragon organization. They followed them to an uncharted island where they were ambushed by Shang Tsung's personal army.
Ring Toss: Back, Back, LP
Leg Grab: Press Block+LP+LK simultaneously.
Square Wave Flight: Forward, Back, LP
Fatality: Forward, Forward, Back, Back, Block
Fighting as Sonya
When fighting as Sonya, always be ready to use her Ring Toss. Use it, jump away, then use it again. This almost always leads to an easy victory.
Fighting Against Sonya
When fighting Sonya always be on the lookout for her Leg Grab. If you duck you'll avoid being caught, then counter with an uppercut. Sonya is very weak when it comes to sweeps and airborne attacks. Use them as often as possible.
Sonya v.s Goro
Repeatedly use Sonya's Ring Toss against Goro to easily defeat him. If he starts to close in on you, perform the Square Wave Flight to move out of harm's way. The continue to use Sonya's Ring Toss.
Captured by Shang Tsung, Sonya's Special Forces Unit was taken hostage - their only hope was the Tournament. Shang Tsung promised to release the entire team only if Sonya could win the contest. Her victory not only released her unit - but also put an end to the Black Dragon and Shang Tsung's powerful grip on the Tournament.