Kopek, son of Nargor

Councillor Kopek was a Klingon male and high ranking member of the Klingon High Council and fevent opponent of Chancellor Martok.

In 2379, in order to steal the command codes for the Imperial Fleet, Worf disguised himself and broke into Kopek's office, forcing him to give up the codes. In exchange, Worf gave him a data rod containing his complete file including a number of misdeeds that had been collected by Lorgh of Imperial Intelligence.

Later that year, Worf met with Kopek in his office as a representative of the Federation to discuss Kopek's opposition to the Klingon-Federation alliance. Kl'rt, the Klahb member whom Worf trapped in the sub-subbasement of the Federation Embassy on Qo'noS was hiding in the closet and once again attempted and failed to assassinate Worf who this time, killed Kl'rt in response. Kopek had arranged for Kl'rt to escape from his imprisonment leading Worf to realize that it was Kopek who was behind Klahb the whole time. (TNG novel: A Time for War, A Time for Peace)