Sean Faris as Luke Harper

Luke Harper was a Ravenclaw at Hogwarts.  He harbored a great sense of loyalty to his brother, Logan Harper, despite the older boy's Dark doings.  He dated Lily Evans (who he deemed "Flower") for half a year, though she eventually cut their relationship off, a couple months after the death of his father. Later his brother was killed by auror Jack Lathe, and he left Hogwarts to go on trial for possible involvement with Logan's Death Eater schemes.