Zofia makes her entrance to the Soviet campaign clad in leather bondage gear. However she remains loyal and committed to the Soviet cause. In the second to last mission she discovers a video tape revealing Yuri is the traitor, and shows it to you, the Commander, before saying her final goodbyes. In the expansion pack, flirting aside she is really committed to your cause, wishing for your safe return.
In the expansion Lt. Eva had unwillingly disclosed the meeting location of the world leaders to Yuri. The final mission briefing showed that she was about to tend her resignation before Carville cuts in, telling her she isn't the only one that had been brainwashed like this and it wasn't her fault at all. In response? She stays and uses the communication links to find out Yuri's hiding spot in Antarctica.
Lt. Eva: Effective immediately, I am tending my resignation-
Gen. Carville: Hogwash! Lieutenant, you're a vital part of this organization! If you think you're the only one to to have his mind twisted by that maniac, you're free to leave! Otherwise, we'll have no more talk about resignations. You with me?
Lt. Eva [with a growing smile on her face]: Yes, sir. Thank you, sir.
In the Soviet Campaign of Yuri's Revenge, Romanov is FAR friendlier, even outright JOLLY at times, without Yuri's manipulation AND knowing you are loyal beyond a doubt, and actually seems to regard you as a friend.