In the mirror universe, Trekal Darhe'el was a Cardassian male who was in the service of the Klingon-Cardassian Alliance during the late 24th century. In 2377, he was the Cardassian ambassador to the Klingon homeworld of Qo'noS and was instructed by his superior Supreme Legate Skrain Dukat to request that Regent Martok turn over the Romulan cloaking device which Captain Kurn had captured from the Terran Rebellion at Empok Nor two years earlier for study. Darhe'el reminded the Regent that the Articles of the Alliance specifically stated that any technology seized from a third party by either of their races was to be made freely available to the other for study.