The surrender ending is I think having around 300 points in Self-worth and 0 in rep. She pulls him into a meeting, admits her surrender and lets him know that he's won, her rep is gone, and that she's told her father that she doesn't want her old position back and to get rid of the coin system thing - but that she wants him to stop what he's doing to her because she feels like her mind is breaking from it, and that wouldn't it be better to have her as an effective soldier/subordinate? He agrees. Then it time skips forward and she tells him that she wants to go back to having their sessions together but just to be careful not to mind break her.