HOOK 1: Kat works as a computer analyst for the FBI. Right now she's a floater, not assigned to a single task force, but rather being sent where her particular expertise and skill set are needed. Maybe you work in law enforcement? Or maybe you're a criminal and would rather deal with someone who doesn't carry a gun.
HOOK 2: Up until a year an a half ago, she was on the other side of things, working as a hacker. Maybe you knew her in that capacity - although it would have been online only unless you were somewhere else, she's traveled a lot but is only recently arrived in Pokoh's Peak.
HOOK 3: She works with victims of abuse, helping them to build new lives. Maybe you're a fellow volunteer, or even someone she's helped.