Violet Lily Potter. Book 1.

*warning* It's a bit slow at first but it will get interesting soon.

What if Harry had a twin sister but didn't know? What if his twin was saved only because of him? In this story this is exactly what happens. They meet on the train to Hogwarts in their first year and become best friends. They always felt that they had some connection but didn't know what that connection meant. Harry is always protective of her and also gets a bit jealous when she speaks to other guys. They find out that thier twins in their third year.