The Birdman is a friend of the Eggman. He resides in Neo Tokyo City and is a guard for Akira and Tetsuo. He is always seen standing on a pole to search for traitors and spies.
He appears to be an esper and may have the power of clairvoyance or remote viewing as he is constantly aware of the locations and intentions of characters all throughout the the territory of the Great Tokyo Empire regardless of their proximity to Birdman. The wrappings that cover his eyes disabling his vision appear to support this theory.