Serena didn't know she was a hunter. At least, not until the world went to shit. She sat in the field office, waiting for a signal from the team that had been sent out of St Louis a week before. A week of waiting while the world collapsed. A week of not knowing the shell corporation she worked for had been abandoned by it's government parent back in D.C. A week before her curiosity got the better of her, so she rummaged through paperwork and hacked files on the computer. And a split second decision to find that team before the wolves did.
She found the team. And the wolves. All but one eliminated by the very dregs of the government agency that had hired them. She took the Forsaken to the nearest KOA at his request, then disappeared. Serena returned three days later with copies of every file and dossier she could get her hands on. Since then, she made her way west, breaking into every known Hunter base and stealing or sabotaging any edge that the Atlantean States could possibly gain on Supernaturals and abandoned Hunters outside of their territory.