- For other uses, see Dax.
|Affiliation:||Federation, Starfleet/Trill Symbiosis Commission|
|Marital Status:||married six times (by the late 24th century)|
Dax is a Trill symbiont who has had many notable hosts throughout history. Born in the year 2018, there have been a total of ten individuals who have hosted the Dax symbiont by the close of the 24th century.
- Lela (21st century; one of the first women to sit on the Trill Ruling Council)
- Enjana (21st century; treasure hunter who tried to steal Molor's bat'leth)
- Tobin (22nd century; scientist who worked with Skon on one of the first transporters)
- Emony (23rd century; famed gymnast)
- Penzak (DS9 novel: Valhalla)
- Audrid (until 2284; head of the Trill Symbiosis Commission)
- Torias (2284; test pilot who worked with Captain Styles and Cadet Saavik)
- Joran Belar (2284–2285; musician and serial killer)
- Curzon Antrani (2285–2367; Federation ambassador to the Klingon Empire)
- Jadzia Idaris (2367–2374; Starfleet science officer)
- Verad Kalon (2370; briefly kidnapped Dax from Jadzia)
- Ezri Tigan (since 2374; former Starfleet counselor, captain of USS Aventine)
Over the centuries, Dax - in its various hosts - has met a number of notable people, these included:
- Jonathan Archer
- Malcolm Reed
- Travis Mayweather
- Iloja of Prim
- Fleet Captain Christopher Pike
- Doctor Leonard McCoy
- Benjamin Sisko
- Lawrence Styles
- Hikaru Sulu
- Sarek of Vulcan
- Admiral Nyota Uhura
- Elias Vaughn
- James T. Kirk
- This is stated to have been when Julian Bashir was still in his infancy, suggesting the host was Curzon.
In an alternate timeline in which the USS Defiant crashed on the planet Gaia, the Dax symbiont eventually passed to Yedrin Dax, the great-grandson of Jadzia and Worf, son of Mogh. (DS9 episode: "Children of Time")
In a timeline where the Defiant was sent back in time to the final war between the Furies and the Unclean, the Dax symbiont was saved- Jadzia sacrificing her life to draw the Unclean away- by Doctor Bashir putting it in suspended animation until it could be recovered in the present shortly before the events that sent the Defiant back in time in the first place. During its years alone with Bashir, the symbiont had mastered a means of synchronising its body chemisty with Bashir's so that they could 'talk' without Bashir actually joining with it so long as certain nerves were exposed. Communicating with its younger self due to a complicated temporal connection they shared, this Dax symbiont sacrificed itself to defeat the Unclean in the present, ending their threat once and for all (Time's Enemy).