Cari Porter is an agent with Dark Sky.
Was, perhaps, is better, but do not ask Porter because when we first encounter her she is in a very dingy, hotel room (and that is being generous) with no memory of who she is or how she got there; all she can remember is a list of names and the urgent need on her part to kill them. She is experiencing a nasy headache and fighting to keep panic at bay from not remembering but she shows an impressive amount of ingenuity in learning a bit more about her circumstances. And while her conscious memory might be failing her at the moment, her muscle memory is just fine as she demonstrates to the trio of hard men who immediately come after her.
If Porter is unable to recall anything, the same cannot be said for the people at Dark Sky.
We are told that Project Dark Sky was a "black ops unit that had been in existence for about five years. Agents were recruited from other government positions, though the applicants never knew exactly what they were being recruited for, unless they were offered a position. They were only told it would be dangerous, the job would take them around the world, and they would be invisible".
"Dark Sky was basically a hit squad, directly responsible for eliminating targets in foreign countries that were identified as a problem, either now or in the future. Their targets ranged from dictators, warlords, drug dealers, terrorists, and politicians to worldwide wanted criminals. Their job wasn't just to kill, though. They could get anyone to do that. The agents in the field had to make each kill look like the United States had no involvement. Each target had to be infiltrated or killed in such a manner that there was no possible way the US would even be considered in having a hand in it. If it couldn't be done to look like a local killing, the organization usually passed on it. They had a very successful record, not failing often in their tasks. The problem they had right now was probably the biggest stain on their record.
"Before any agent was put out in the field, they had to have a tracking chip implanted into the back of one of their shoulders. Once a job was finished, they were usually directed to return to the United States, where they could undergo testing. They were also injected with several shots, a mixture of drugs that were supposed to keep them performing at an optimum level. Up until that point, there had been no known ill effects. No one had experienced headaches, dizzy spells, loss of energy, memory issues, nothing. And they weren't sure what the issue was now. They didn't know if it was drug related, Porter had gotten injured, or she just decided to take a powder.
As we watch the leadership at Dark Sky discuss their immediate concern with Cari Porter, we learn that "she was their top target at the moment". "She was one of their best agents. She had always gotten the job done in her four years at the agency. She'd never failed at an assignment yet. Until now. She'd been off the grid for several days, her tracking chip either malfunctioning or having been taken out. They didn't know if she was alive or dead. Though they probably would have preferred her to be dead as opposed to the problem they now had. Now, they had a rogue agent on their hands".
So Dark Sky is worried she may be a loose cannon while she cannot remember who she is or why people are after her and since Dark Sky would rather she just die to resolve the situation and she would rather that she did not, the situation grows more ... intense.