Tekeny Ghemor was head of the Obsidian Order for the Klingon-Cardassian Alliance in the mirror universe.

His daughter, Iliana, would herself join the organization, but then defect to the Terran Rebellion under Smiley O'Brien. She would later describe him as a cold, heartless man, a completely different person than his primary universe counterpart and more like that universe's Enabran Tain. (DS9 novel: Fearful Symmetry)