Nicole

Nicole was a member of Habib Marwan's terrorist cell.

Day 4
Having established a romantic relationship with Air Force pilot John Hansen, Nicole was in a hotel room with him when her cell phone rang during Day 4. She answered it and passed the phone to John because it was his wife, Dori. Dori told John that she and their kids were being held at gunpoint. John looked up and saw that Nicole was pointing a gun at him. She ordered him to get dressed and held him hostage until Mitch Anderson arrived.

Later, she was ordered by Habib Marwan to go to Anderson's apartment to recover an incriminating computer file which the goverment would soon have its hands on. There, she briefly encountered FBI Agent Drake and killed her. Later, she posed as Agent Drake when Jack Bauer and another CTU agent arrived. She was with the CTU agent when he found the file and silently killed him with a knife while Jack was in another room. Jack saw the dead body and shot at Nicole. They engaged in a shootout. She took cover behind a staircase, but Jack simply shot through it, killing her.