Echo

"Some say it was just a boy, Blood Moon stormed into his village, and almost slaught everyone. Kid pulls the knife from his dead sister and goes to work. He cuts down some of the Moon's finest warriors by stealth. The boy was standing among the moon's corpse. They give him a name, Echo."

- Silver Herondale Echo is a group of Human and Faunus Warriors with the purpose of stopping Blood Moon from growing into a powerful empire.

History
Before the great war, a brutal organization known as Blood Moon expanding their activities across the mistral, seizing the land while killing everyone who opposed them. They slaughtered everyone in a village except a boy, who fought back, using a knife he pulled from his dead sister's body. He was able to defeat the Hand's best warriors by stealth. He became known as the Echo.

As Echo grew, he recruited as many peoples who can fight as he could to his side, training them how to fight and passing down his knowledge of the Blood Moon, whether it is a man, woman or children. However, it does not matter to him at all but what matters was that he wanted to stop and destroy the Blood Moon at all cost.

The Echo quietly and secretly continued to operate into the present day.