Sarin (portrayed by Melinda Clarke) is a minor supporting character in the pilot episode of Star Trek: Enterprise. She was a former member of the Suliban Cabal who had grown disenfranchised with her faction's activities and formed a resistance movement against them.
In 2151, Sarin met with the Klingon courier Klaang on Rigel X, and provided him with proof that the Cabal was staging attacks within the Klingon Empire in an attempt to start a civil war. She and her compatriots later encountered Captain Jonathan Archer and the crew of the Enterprise NX-01, who were searching for Klaang after he had been abducted from their ship by the Suliban. Sarin had Archer's crew detained while she attempted to determine Archer's true intentions. Upon coming to believe that Archer was telling the truth about wanting to return Klaang to Qo'noS, Sarin released Archer's crew and offered her assistance in the completion of their mission.
While Sarin was escorting Archer back to his shuttlepod on the roof of the trade facility, they were attacked by Suliban Cabal members. Sarin was killed after being struck twice by phaser fire.