|Family:||Sara Blake (sister)|
|Killed by:||Sara Blake|
|Mission death:||The Ultimate Power|
|Game(s):||Psi-Ops: The Mindgate Conspiracy|
|First appearance:||Unfinished Business|
|Mission(s):|| Unfinished Business|
Assembling the Pieces
The Ultimate Power
|Voice actor:||Joanna Buese|
Tonya Blake is the identical twin sister to Sara Blake. Sarah joined the Movement as a double agent to look for her.
Tonya Blake was born as the indentical sister of Sarah Blake. Unlike her sister, however, Tonya never liked being a part of Mindgate, the American psi-operations agency that adopted the Blake sisters after the death of their parents. Tonya's very existence is not noted until a few missions into the game; for a time, Sarah seems to rotate between friend and foe for no reason. Tonya poses as her sister to steal Luna 1 from Nick, claiming to hold it for safekeeping before his fight with Edgar Barrett. Close to the end of the game, Tonya finds her sister and Nick in the Movement's base in the Himalayas. Holding them both at gunpoint, Tonya gloats over her deception of both her sister and Nick- Nick believed she was Sarah, and Sarah had for years believed her sister missing and presumed dead. But her greatest triumph- in Tonya's eyes- was getting away with murder as a child, when she killed the Blake sisters' parents so Mindgate would adopt them and help the twins develop their powers.
"It was because our parents died that we were taken in by Mindgate - I wanted that to happen. Our parents would never let us develop our true power. I killed them to ensure our future". - Tonya reveals she killed her and Sarah's parents.
Tonya's final appearance is in The Ultimate Power, when she poses as her sister one final time, attempting to use Nick's confusion as a chance to kill him. Sarah has followed her sister into the chamber, however, and shoots Tonya in the back of the head with a pistol. As Tonya falls back into a deep shaft behind her, Sarah coldly remarks, "Mom always did like me best, bitch."