Assassins of the Shadow Guard. ASG

Slow updates. mostly crossovers in my own au. oc have copyright pls inform before using.
I do not own any of the characters other than my ocs. Will write. credits to the real owners in a chapter.
READ: Back Story:
The world has advanced in technology and strength. Most of the planet is in peace exept for some skirishes every here and there. However, as the world advanced, wars increased and soon there were wars almost all over the globe. But from these wars, peace started to rise, governments took control, and the enemies slunk into the shadows. A new era, a new system, began. Heroes vs villains (not mha). Heroes used top notch tech provided by governments to stay in power. Villains also have their own tech. Bio tech. Villains were not much powerful however as heroes constantly raided them.
Through this a neutral organisation appeared.. sometimes helping the government, sometimes intervening in government operations... They were feared but respected as the assassins of the shadow guard.. for context, the shadow guard is the guard that protects the emperor of Japan.. the current emperor yamato decided to start the assassin squadron for the shadow guard to assure the public that he was still around .
The story follows the main character Hayden through his life as a gun for hire to become the emperor's most loyal servant... Enjoy