she is harry Potter's Aunt. And James adopted sister. No one in the wizarding world knew of her but Dumbledore, hagrid, Lupin and Mcgonagle. The reason she was hidden was cuz she was bitten by a werewolf when a Baby. And she stayed at Lupins to help him not attack people. Cuz when she was a werewolf she still had her conscience. what would happen if she came to teach at hogwarts as Lupins assistant? will Students find out what she really is? would Snape not like her anymore? read to find out