Erik Jan Hanussen is a character from Fullmetal Alchemist: The Movie - Conqueror of Shamballa, portrayed as a clairvoyant operating in 1920s Munich. His background is rooted in his real-world historical counterpart, a well-known occultist and mentalist active in Germany during the Weimar Republic. In the film, his profession and his association with the Thule Society, a secretive occult group that forms the film's primary antagonistic force, define his role.

Hanussen appears primarily in a single but pivotal scene set at a carnival. During this event, a group of Romani people hand over a young girl named Noah to him, intending for him to deliver her to the Thule Society. This action establishes his role as a minor antagonist and an agent of the society, acting as a middleman in their efforts to acquire individuals with special abilities. However, before he can complete this task, Noah manages to escape from his custody by hiding under a tarp covering a rocket constructed by Edward Elric and Alfons Heiderich.

As a character, Hanussen is defined by his position as a charismatic liar and a figure of manipulation, which is a trait that creates a deliberate parallel with a character from the original anime series. His counterpart in the parallel world of Amestris is Frank Archer. Both characters share a manipulative nature and cunning demeanor, serving as antagonists who use deception to further their goals. This relationship to an established series villain helps to quickly define his persona within the film's historical setting. Unlike some other historical figures in the movie who play more active roles, Hanussen's direct involvement in the plot is fleeting and his development is minimal, serving as a functional character to advance the initial conflict surrounding Noah and her connection to Edward Elric. His most notable ability, or at least his claimed talent, is that of a clairvoyant and mentalist, which aligns with his historical reputation and his position within the Thule Society's occult circles.