Nadine Hale's family home was caught in a house fire she thought her and her uncle Peter were the only ones alive but little did she know, her brother Derek Hale was alive, after the fire Noah Stilinski took her in and so for that day on, Stiles and Nadine has been like brother and sister, but everything changes when Nadine finds out Derek's been alive all this time. (Scott McCallxoc season1-6)