Halt's Ranger Apprentices- John Flanagan Ranger Apprentice fan-fiction

A fifteen-year-old girl, meets fifteen-year-old Will. Two apprentices, one Halt. The life of this girl was out of the ordinary, secretive, very few knew that the grim, dark and cunning Halt had been raising a girl for fifteen years. There's something that's been bottled up by people the girl had never thought twice...