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Nicki Lynn Aycox (born May 26, 1975, in Hennessey, Oklahoma) is an American actress best known for her roles as Syl on the series Dark Angel and Stella Vessey on the dramedy Ed. She also had a stint as the unreliable sister of Detective Rush on the series Cold Case and as Pvt. Brenda “Mrs. B” Mitchell in the FX series Over There. She was the first actress to appear on CSI: Crime Scene Investigation as Captain Jim Brass’ daughter, Ellie. She had a recurring role as Meg Masters in the first season of the WB (Now CW) series Supernatural. She had a role on Criminal Minds as Amber, a villainous sociopath in the episode “The Perfect Storm”.