Torias Dax
In the fictional universe of Star Trek, Torias Dax was the first Dax host to join Starfleet, serving as a shuttle test pilot. Torias was piloting a new Starfleet shuttle when it experienced a catastrophic system failure and crashed, costing Torias his life. After Torias' death, official Trill records indicated that Dax was held in stasis for six months and then transplanted into Curzon; however, this was actually a coverup by the Trill government, as Dax's next host was Joran who was a psychopath and a murderer.
Torias left behind a widow, Nilani. His memories were briefly transferred to Julian Bashir during the zhian'tara ceremony of Jadzia Dax.