Kol

Kol was a Klingon villain introduced in the Star Trek: Discovery pilot The Vulcan Hello.

By the 2250s he led the House of Kor, one of the 24 great houses of the Klingon Empire.

As a leader of a noble house descended directly from Kahless, Kol looked down on most other Klingons, especially those who were outcasts from Klingon society. When T'Kuvma summoned the 24 great houses to a binary star system to fight the Federation, he refused to join up with T'Kuvma, promising to one day see T'Kuvma put in his place.

About six months T'Kuvma's death, Kol wanted to obtain the technology of T'Kuvma's flagship, to not only enable the defeat of the Federation, but to enable him to overthrow the current leadership of the Empire and rule the Empire himself. To that end, he pretended to acquiesce to T'Kuvma's successor Voq's leadership of the House of T'Kuvma, and to join forces with Voq.

Giving the starving crew supplies from his own ship, he was able to convince nearly all of them to turn against Voq once Voq had retrieved technology from the wreck of the USS Shenzhou that allowed them to fix the warp drive. Kol stranded Voq on board the Shenzhou, and left the area. However, T'Kuvma's lieutenant L'Rell transported over to the Shenzhou, and provided Voq a means by which to escape the wreck.