Allison Cowley appears in "Yang 3 in 2D ". She claimed to have been kidnapped by Yin, but was really his accomplice and apprentice. She is portrayed by Mena Suvari. In "Yang 3 in 2D", she is kidnapped by the returned Yin and held in a house. She escapes the house and goes to the police. There she gives Shawn a picture of him and Yang together. At first Shawn is the only one to believe that she was kidnapped by Yin.