Primus Vanguard

During a time of darkness, the Primus Vanguard (プライマスヴァンガード Puraimasu Vangādo) vanquished evil to restore peace. But upon their victory, Corps member Straxus turned traitor and killed the leader, stealing his badge of office, the Matrix Sword.

Due to the members' coloration, the Vanguard is also referred to as the "Blue Corps" (青き軍団 Aoki Gundan).