A youthful Shepard gazes up at the Milky Way and dreams of a day of maybe being able to go out, and explore the galaxy. She wonders what it will be like to travel to far-off worlds, meeting new and interesting peoples, discovering new life forms, and joining the galactic community that has existed outside of Earth's knowledge for all of humankind's history.
She's paid close attention to any news concerning Earth's new alien co-inhabitants of the galaxy: the ethereal and beautiful Asari, the cold and highly intelligent Salarians, and the powerful Turians who've already had a violent encounter with humanity in the First Contact War.
At the age of 16, she is still too young to join up with the Systems Alliance, but she certainly plans to, as soon as she can. She has recently been exposed to Element Zero, and is starting to manifest some biotic abilities, and she is eager to prove to herself and to the galaxy that humanity can live in peace in this newly-found galactic community. If we can all work together, we can accomplish amazing things. Shepard feels this should be self-evident to all.
Even as a young woman, Shepard's mind lived up, up, out... among the stars.