Son of Potter, Daughter of Black

Harry felt he had lost his chance at family after watching Sirius fly away only for his godfather to show up during the summer. Sirius teaches Harry what he needs to know, helping him become the true Lord Potter. Then the Tri-Wiz comes and the deepest, darkest secret of the Marauders is revealed - Harry was born the daughter of Lily and Sirius. Eventual Fem!HarryxTonks