Ziva David

Officer Ziva David first appears in the third season, having been sent to NCIS following the murder of Special Agent Todd by Ari Haswari. She is Ari's control officer and half-sister due to the fact that they shared the same father, Mossad's then Deputy Director, Eli David (Michael Nouri). Eli is later described as Director of Mossad.[39]During the episode "Kill Ari (Part 2)", NCIS Special Agent Gibbs finds himself cornered by an armed Ari, but Ziva emerges at the last minute and kills Ari