With only a week of freedom in mind, Histoire knew that she had to find a method to convince Ikari to confide in her present self. She had to make him realize that the old Histoire he once knew was gone and the chances of her coming back were very slim. She had to make him realize that she was just as capable as her present self as she was back when they first met.
It may have taken her longer than she expected to gain Ikari's trust though, for she had been with him for about a year before she decided to leave to see her family. That was before she lost her memory and she began to wonder what it was that might have happened between the time she left the gang and the time she moved to Aberdeen in order to attend ÍU.