Leka Trion

From Memory Alpha, the free Star Trek reference.

Leka Trion was a native of Peliar Zel during the 24th century and its governor during the crisis of 2367 between Alpha moon and Beta moon.

As governor, Trion appealed to the Federation to mediate the crisis, which teetered on open military conflict. The Federation agreed, and at Trion's request, Ambassador Odan was dispatched to help negotiate a resolution to the crisis.

Despite Trion's fears that the Alphans and Betans would not come to the negotiating table, Odan persuaded her to try, saying that "Those who ignore a shout, may strain to hear a whisper." Trion, reassured by Odan's words, was able to bring the sides together so that Odan could resolve the crisis. (TNG: "The Host")

Leka Trion was played by actor Barbara Tarbuck. The costume worn by Tarbuck as Trion was auctioned off in the It's A Wrap! sale and auction.