Reassociation

From Hidden Frontier

The law defined by Trills for a symbiont to not be involved intimately with a partner they had previously been in an intimate relationship with when they were joined with a new host ("Rejoined," DS9). The result would cut that Trill host and symbiote off from Trill and their families.

Most recently, in 2382, it is believed that the symbiont known as Dao died with its most recent host Cassius due to a neurological disorder that only effects Trills ("The Battle is Joined").

However, only known to the senior staff of the USS Excelsior and limited high ranking officials, such as Commander William Martinez (commanding officer of the Grey Research Facility), Dao was transplanted into a new host, Jorian Zen ("The Battle is Joined," "Homeport").