Revok

Revok was a male Cardassian and a Gul in the Cardassian Guard in the 2370s.

In late 2375, Revok told Corat Damar he was willing for himself and his troops to join the Cardassian Liberation Front. Damar later travelled to Cardassia for negotiations with Revok and five other Cardassian military leaders. However, it was revealed Revok was working with the Dominion and informed them of the meeting. Damar's ship was destroyed and several Cardassians waiting for him on the surface were killed. Revok arrived at the scene soon after to view the aftermath. Weyoun later praised Revok in a speech to the Cardassian people. 

Malyn Ocett was the only other resistance cell leader to survive the Dominion's assault after Revok's betrayal. 

Damar came to greatly regret trusting Revok, wishing he had listened to Kira Nerys' warnings. After telling Kira he did not trust her friend Estal Vilar, Kira pointed out he had been wrong about Revok. Kira expected this to anger Damar, although he admitted he had been wrong about him. (SS DS9 (Face Value))