Karra was a young female Klingon and member of Klahb. In 2379 she participated in the attempted takeover of the Federation Embassy on Qo'noS. She was hired as a kitchen steward one week prior to the takeover. Worf did not recognize her when she brought him a plate of gagh, which caused him to look up her personnel file in the embassy staff records.
When Worf was able to reactivate the security system in the embassy and flood the building with anesthizine gas, Karrah was captured along with all of the remaining members of Klahb except for Rov. (TNG novel: A Time for War, A Time for Peace)