So far I have it that she's been brought on board by ~rightmove, also her handler, who negotiated a deal for her so she feels like she owes him big time. I'm thinking maybe between him and Sonny, they might be the only two who know about the "hunger" since I imagine it's something Ana would feel very uneasy about.
Ha! She would appreciate that a lot. All the training and missions probably take a lot out of them all, and she probably uses other things to offset the "hunger" like feeding her actual appetite, lol