Sorry I checked Out World:
Rain, Kira, Kano, Reptile, Shao Khan, Mileena, Baraka, Nitara, Jade, Shujinko himself LMAO, Frost, Sub-Zero, Smoke (Robot), Johnny Cage, Li Mei, Hotaru, Noob Saibot, Tanya, Liu Kang, Raiden, Blaze, Kobra, and Onaga. (Onaga is in the begining intro LMAO)
But there isn't Sonya. I'm sure if someone had saw Sonya they would have added it to their list by now. In Out-World if you look at Kira from a distance she WILL look like Sonya, which is the light playing with your eyes.
The only places to see Sonya are:
Chaos Realm around the same area where you get trained by Noob-Smoke.
Other than that... I don't think so. No offense.