I looooove Alex stories, and you've done a great job of mixing her toughness with just that little hint of vulnerability she shows every now and then.

Tomorrow, she'll be gone, on her way to the next adventure. Tomorrow, there will be no proof she was ever here. Even now, she's like a spectre, invisible to the unknowing crowd. There's a power in this. She is no one, and she could be anyone. Imagine the possibilities.

This is exactly how I see her. :-)