 An astrophysicist and a friend of Thor under Loki 's control , who is studying the Tesseract 's power . Regarding Loki 's control over Selvig , Skarsgård said , " Well with the scene we did in Thor , it was like Loki , one way or the other , entered Erik 's mind . And in Avengers , you will see more clarity in how Loki is using Erik 's mind . " About his role , he said , " [ My character ] is of importance but the size of the role is not big . " 
