Laas

Laas (played by J. G. Hertzler) was a Founder and one of "the Hundred" Changelings sent out by the Great Link to find the Progenitor.

Laas ended up on the planet Varala and took humanoid form in the 22nd century. He and Odo met in 2375. After a brief but eventful period with Odo on Deep Space 9, Laas resumed his search for the other members of the Hundred. (DS9: "Chimera")

Laas later returned to the Link and was often the Founder who relayed news of the Link's decisions to Odo when he took humanoid form. (DS9: "Avatar")

Laas became one of the last Changelings in existence after the apparant "suicide" of the Founders. (DS9 novel: WoDS9 volume three: "The Dominion: Olympus Descending")