During World War II, Ghost Girl was a member of the Crusaders. She was a Scottish girl who was given the ability to generate a holographic "ghost" double of herself , that could refract light so as to make herself appear to be a meter away from where she really was. She later abandoned the machine after the belt that powered it was destroyed and she learned of its Nazi origins.
Ghost Girl formerly wore a belt that gave her the ability to generate a holographic "ghost" double of herself. It's unknown where she is now.