Captain Quantum (real name unknown) is a member of the Empire City Guard. Beyond the fact that he flies, his power set is currently unknown. He has been described as "the generic superhero".
He's one of the heroes on the scene of the Grand Hall of Sinister Wisdom's attempt to raid the Atlantic Heritage Society.
He's part of the response to the Grand Hall's attempt to capture The Angel of Hell's Kitchen.
He appears with the rest of the Guard in a battle involving several Whateley students, the Cadet Crusaders and the Anti-Champion in Brooklyn.
Sometime around late February, 2007, the Mamba was arrested for damaging a block of the New York Lower East Side in a confrontation with him.