She was actually supposed to have a major role in the early stages of development, a reoccurring character that would cause you trouble, ninja loot stuff and all that jazz.
Because of the planned length of the story however, we decided to cut her out. We really wanted to be able to flesh out all of our major sub-characters to get people invested instead of having a battalion of 1 dimensional characters appearing all over the place. Whether we've succeeded with that or not is another discussion, but that was the thought process at least ;D
With all that said, having her hang around as a regular NPC somewhere would probably make sense.