Alexis Potter, that's my name. My brother Harry and I are twins - or we thought we were, until our nightmares started screaming it in our faces that we were not the only ones left in our family. And don't tell anyone, but one of my best friends is a werewolf, and we became - what was it? - Animagi to help her. To spot me, look for a purple-eyed, grey cat at the full moon.

Amethyst Weasley, the youngest Weasley and the only Weasley to be a metamorphagus. As her family depart to Hogwarts, and as she eventually does herself, questions flood her mind. What happens if I'm not in Gryffindor? Where did Ginny get this mysterious diary? And why won't mum and dad let us know what they're hiding about this year at school?