Sarin

From Memory Alpha, the free Star Trek reference.

Sarin was a Suliban female. A former member of the Suliban Cabal, she turned dissident, as she disapproved of the Cabal's aims and methods. Sarin provided Klaang the Klingon with proof of the existence of a Suliban Cabal plan to undermine the Klingon Empire. She was killed by Cabal agents on Rigel X after telling Captain Jonathan Archer about the Temporal Cold War. (ENT: "Broken Bow")

Later, Colonel Grat learned that Archer and Sarin had met. The colonel asked whether the Suliban female had told Archer of the war, but the captain refused to respond. (ENT: "Detained")

Sarin was played by Melinda Clarke.