the other Argent (Teen Wolf x oc)

Evelyn Argent is Allison's older half-sister she was Derek's best friend. After the fire at the Hale house Evelyn fled from Beacon Hills believing her best friend and most of his family was dead. Seven years later Evelyn comes back to Beacon Hills when she learns the little bit of family she has left is in danger from a familiar enemy. But what about Derek what will happen when Evelyn comes face to face with her old friend.