Odan

Odan is a Trill symbiont of undetermined age. At least two of its hosts in the 24th century have served as Federation ambassadors. At the time, symbionts and their joining with humanoid Trill was still not public knowledge off the Trill homeworld, and the second Ambassador Odan presented himself as the son of the previous host. Odan refused to use a transporter, preferring travel by shuttle.

In the 2330s, the "father ambassador" Odan helped prevent a war between moons of Peliar Zel.

In 2367 the conflict between the Peliar Zel moons flared up again, and the "son ambassador" Odan again attempted to mediate. An attack on his shuttle killed the host, but the necessity to use a human, William T. Riker, as a temporary host forced the public exposure of the joined nature of the Trill.

Unlike joined Trill, rather than a blending of personalities, Riker's consiousness was almost completely suppressed while host to Odan. He was, however, able to preserve the life of the Odan symbiont for a crucial number of hours needed for a new Trill host to arrive and perform the transfer.

Odan's new host was Kareel.

Hosts

 * "father ambassador"
 * "son ambassador" (?-2367)
 * William T. Riker (temporary) (2367)
 * Kareel (2367-?)