The Fifth Marauder

We all know the stories of the Marauders. But what if there was another? Nixie Ryder finds herself in the Marauders 'gang' in Hogwarts, but can she keep her secret for long? How will she change the well known story of the boys who lived for mischief? And will she find love? SB/OC Set in Marauders era, will continue through to HP era