I love Millicent. Not that we know much about her, but being...well...larger than others, acting frustration out through violent behaviour is too well known. I think we all have known a kid or teenager like that.

I liked your story so far. Good characterization, a clear understanding of how it is to be different - no matter how.

You made a despicable Pansy, a mysterious Nott and a likable though still canon-ish Draco.