Since her early childhood, Eli trained her in combat tactics and espionage (according to Ziva, one of her earliest memories of childhood was her father leading her and her sister into a forest, blindfolded, then leaving them there to find their way out again).
She commented in "Tribes" that her childhood best friend, a Muslim, was killed in a retaliatory Israeli air-strike when she was twelve.
Due to her relation to Ari, Ziva's appearance and eventual assignment to Gibbs' team draws fierce resentment from team member Anthony Di Nozzo, forensic specialist Abby Sciuto, and even from Gibbs himself when he learns that Director Shepard had assigned Ziva to his team without his knowledge.
She later proves her worth in the same episode by using her training to save herself and Dr. Burns, a rogue member of the Smithsonian Anthropology Lab.
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). 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 with a single gunshot wound to the forehead, similarly to the way Ari had shot Agent Kate Todd in the season 2 finale, "Twilight".
At the end of the day, I leave it in the hands of our fantastic fans and audience".
Outside of fiction, the cultural impact of Ziva became a subject of discussion among various critics, with academics and rabbis weighing in on the matter.Accused of being a double agent, she becomes a fugitive and is forced to ask for help from Gibbs, who had retired from NCIS at the end of season 3 and is living in Mexico.They ultimately prove her innocence, and this event prompts Gibbs to return to NCIS.She replaced Caitlin "Kate" Todd (Sasha Alexander), who was killed at the hands of Ziva's half-brother, Ari Haswari (Rudolf Martin), in the season 2 finale.Following the onscreen death of the character's father in season 10, Gabi Coccio recurrently portrayed a young Ziva in flashbacks.Ziva is introduced to the show as an Israeli citizen, an agent of the Kidon unit of the Mossad, a daughter of Mossad Director Eli David, and a friend of NCIS Director Jenny Shepard.