Currently known as “The One Armed Man” (for obvious reasons), Heyder Alizadeh is a top-level mystic operating inside of the Middle East. His arm was severed at the shoulder nearly ten years ago. The Team knows, based on the memories of Agent “Zero” and the academic expertise of their Finnian Collector’s Society member, that this occured during a failed ritual that attempted to pull “The Presence” out of the Fringe and trap it inside of Agent “Zero”.
While Heyder Alizadeh’s affiliations are unknown, Emterran revealed that he worked for Heyder to capture Agent “Zero” for the ritual. This would indicate that either Heyder is within hierarchy of the Guardians of the Whispering Knife or Emterran is working for more players than just the Archer Foundation.