The Generations
The First Generation
These are the guys and gals that showed up first. They crept their ways into high positions of power using their unusual talents (or most of them did). The kept tabs on the second generation that started to pop up.
The Second Generation
P.I.A.: The P.I.A. is the secret group of second generation mutations that runs around keeping tabs on its peers. Someone snuck into the P.I.A. computers and labeled each and ever second generation known for termination.
Non-P.I.A.: Fortunately, some survived the initial termination attack. Trying to band together, they now search for their peers.. and for the unknown person/thing/group that tried to kill them.