Native of the universe know as earth 8, American Crusader is the leader of the Retaliators and he represents the spirit of his team: Ready.
When the heroes from several parallels universes crashed in his homeworld, the American Crusader was the first one to stand against them, being cautious about their origins and intentions but he was ready to stop the attack of interdimensional forces upon his world, including the zombie versions of himself and his allies.
American Crusader uses a shield capable of expanding itself to protect him and others from any attack or danger.
American Crusader is a homage/doppelganger character based on Captain America. As the Marvel character he also uses a shield as main weapon.