The Redeemer

After a nasty werewolf bite when she is twelve, metamorphigus Francine Harper transfers to Hogwarts. She meets the Mauraders, a group of pranksters known well in their school. Francine speaks fluent French, having gone to Beauxbatons, and starts to fall for the Lupin boy. Little does she know that he is the same thing she is, a werewolf; both bitten by Fenir Greyback. Soon a mysterious person starts giving her potions to help with the transformations, and she longs to know who it is. Who is her hero?
Who is her Redeemer?