Power the Dark Lord knows not: Angry older sister who adopted you

Lyra Malfoy was not even one week old when she had her first brush with death. Had her mother taken five more minutes to wake up, Lyra would be dead and there would be no visible reason for it. She would be buried in family crypt and would be mourned deeply by her mother. Her name would go unmentioned until almost nineteen years later, when during the Battle of Department of Mysteries, the Veil of Death exploded and from the explosion appeared two people, Cedric Diggory and Lyra Malfoy.