Jason Blair was a Delta Force and a member of TF. He also had had a younger brother, Chris, who became Crisom after becoming an experiment. He lost his parents prior to entering Wade elementary school and was one of the those selected to be experimented on by A.T.C. When he became a Delta Force, he found out A.T.C. was behind the incident which caused the loss of his brother and investigated as TF.
He appears as one of the playable characters in TF side in FEAR Online.