Jadzia Dax

Jadzia Idaris was born in the year 2341 on the planet Trill. She had one sister, a twin named Ziranne.

Jadzia knew from a very young age that she wanted to be Joined, and worked all of her life towards that goal. She was joined to the Dax symbiont in early 2367 after the death of the previous host, Curzon Dax.

Commander Jadzia Dax served Starfleet at Federation Starbase Deep Space Nine from the years 2369 until her untimely death late in the year 2374. She was survived her sister Ziranne and her husband, Commander Worf of Starfleet.

In the year 2367, Jadzia participated in an archeological dig on the planet Pandora, where she encountered a powerful object called the Codex. (short story Prophecy and Change: Chiaroscuro)

In 2372, Jadzia returned to Trill when her sister Ziraane, who never wished to joined, turned up in a Trill hospital joined to the Roa symbiont. Ziranne had discovered a symbiont black market run by an unjoined Trill named Verad, who had stolen the Dax symbiont from Jadzia briefly in 2370. Jadzia and Ziranne, with the assistance of the Trill Symbiosis Commission, found Verad, and brought an end to his symbiont black-market. (short story The Lives of Dax: Reflections)

In mid-2374, Jadzia was attached to Project Blue Sky, a think-tank designated as a scientifically orientated war research project, with the Romulans. Jadzia and Romulan Sub-Commander T'Rul created an enzyme that was supoposed to alter the genetic profile of the Jem Hadar, without success. (short story Prophecy and Change: The Devil You Know)

After Jadzia's death, the Dax symbiont moved on to reside within it's new host, Ezri Dax.