The Mauraders:Potters sister

(The first book in 'The Mauraders' series)
You are Grace Potter. You are related to, of course,James Potter. It's your fifth year at hogwarts and he and you have made some good friends, though you don't hang out with his very often, it's nice to not wonder alone all the time.
You are a werewolf, so unfortunately, your shift painfully into a werewolf.
The only scars you have is all over your arms, legs, and torso. You try to not get your face scratched. Don't want to look surspicious do we?
--
I see running to the train atlast, my brother and his friends. Sirius, Peter and Remus. James dragging along a poor girl. I think her name is lily. I look away out the window and absent mindly go for a piece of chocolate in my pocket, but when I don't find it I see Remus sitting beside me, eating my chocolate.
"Hey! That was my chocolates!" For some reason, on some words I always sound like I've added an s on the end. He handed me back two of the last pieces. "You could've just asked and I would've said yes." I shrug and put the chocolate in my mouth.
"Thanks. Sorry I ran out and when I run out I turn in-"
He quickly stopped and put his head in the open book which was in his lap. What was he about to say. I quickly change the topic. "It's going to be a full moon tonight." Remus stiffens, but I send myself a cold shiver down my spine. "I think it's going to be great. What about you?" I say through slightly gritted teeth. The boys always go somewhere on a full moon so I though to brig it up."sure."
The. Everyone else finally comes into the compartment.