Ziva David is a character on NCIS. She is a probationary ("probie") NCIS agent pending U.S. citizenship.
David was a Mossad (Israeli secret police) operative who was sent to NCIS following the murder of Special Agent Caitlin Todd by rogue operative Ari Aswari.
She was Ari's control officer and half-sister; they shared the same father; Deputy Director of Mossad Eli David.
At one point NCIS Special Agent Gibbs was cornered by Ari, but Ziva emerged and kills Ari. After his death, she asked to be assigned as a liaison for Mossad at NCIS.
Ziva's liaison position was later terminated under the orders of Director Vance following the death of Director Shepard.
Ziva went on to work undercover in Morocco after her liaison position was terminated, however it was later learned that Vance had deliberately sent Ziva back to Israel in order to help uncover a mole within NCIS.
Believed dead, Ziva was rescued by Tony, McGee and Gibbs, who killed her terrorist captor himself.
Little is revealed about Ziva’s personal life, but she is close with Special Agent Tony DiNozzo.
Ziva is Jewish, and is always seen wearing the Star of David, though attention is rarely drawn to this.
Tony: Don't worry McScout; We got our Mossad hunting dog. Bark once for yes.
Tony: (on the phone) Hey Probie, what I am looking at?
Vance: A career in the fast food industry.
Tony: Director Vance. How are you, sir?