A Klingon noblewoman who speaks for the House of D'Ghor on the High Council during the war with the Federation in 2256 and 2257.
Dennas is played by Clare McConnell in the first season of Star Trek: Discovery, appearing in Battle at the Binary Stars, Lethe and Will You Take My Hand? She is one of the leaders of the twenty-four great houses who answer T'Kuvma's beacon, and she questions how he proposes to unite them.
In Lethe she and Ujilli of the House of Mo'Kai pose as dissidents willing to discuss peace on neutral Cancri IV. The meeting is a trap arranged with Kol, and when Admiral Cornwell attends in place of the injured Sarek the two Klingons kill her escorts and take her prisoner.
Dennas is among the house leaders gathered on Qo'noS when L'Rell, holding the detonator to a bomb planted in the planet's core, declares herself chancellor and ends the war.