AU Hogwarts

What's really nice about Hogwarts when you can't sleep is all the places you can find which will give you privacy if you look long enough. Kate had found the seemingly abandoned roof of the South Tower a while ago and with it's parapet to block the view of pretty much anyone not flying, it was perfect for her needs. Tonight she stands in the middle of the roof and tosses a hand full of marbles into the air. Quickly, before they land, her wand is out and with several chants of, "Wingardium Leviosa!" all the marble begin to orbit her.

She's concentrating hard as keeping that many spells going at the same time is tricky but she still keeps an ear out for anyone climbing the stairs. Maybe she should worry more about brooms though...