In defense of the alfa legion, they could have easily infiltrated most of the legions. They hold all the characteristics in that way, but I get yout point that their thing about secrecy as their identity makes it so that they can't reveal what they are all about because it goes against the espionage and infiltration agenda. But if it is revealed that they actually directed the course of the story in a significant manner, you can kind of get cool setup for them. They can play all parts, and play all sides after all.