She did not want to be known only as the wife of her husband. She insisted on having her own 'identity'. [=on being known for her own qualities, achievements, etc.]
The face of the witness was hidden in order to protect her 'identity'. [=to keep her name from being known]
He has a strong sense of personal 'identity'. [=a strong feeling about exactly the kind of person he is]
(..) Remember? The venom puts the subject in a dissociative state. And they torture him. With shocks and beatings, and strip down his identity. And then all of that suffering and fear is redirected. Associated with other memories or a person. They can change his memories of Katniss? (..)2014 The Hunger Games: Mockingjay - Part 1