The humanoid people of Peliar Zel and its two inhabited moons, Alpha and Beta, whose long-running quarrels over resources are regularly mediated by the Trill ambassador Odan.
The natives of Peliar Zel are humanoids who have settled both of their planet's moons. The two colonies have distinct interests and a history of disputes, and the planetary governor has more than once had to bring in an outside mediator to keep the peace.
They appear in the Next Generation episode The Host. Alpha moon has begun drawing power from the planet's magnetic field, which is damaging the environment of Beta moon, and Beta threatens war. Governor Leka Trion asks for Ambassador Odan, whose father is remembered for settling an earlier crisis.
When Odan's host body is fatally hurt, the delegates from the two moons learn that the Odan they trust is a symbiont, the same being as the supposed father. Riker carries it through the talks as a temporary host, and an agreement is reached.