Serena walked anxiously into the common room, clutching a pile of books to her chest, and looked around, pleased to find it empty. She threw her bag into the corner of the room, and her head started to flip between the bag and the bookcase. She sighed. Who knew when a chance like this would come again? A grin grew on her face, and she placed her books reverently on a table before running over to her bag. She pulled her ballet flats out of her bag and slipped them on before walking back to the middle of the room. She impatiently ran through her warm ups before she got onto her favourite excersise: turns. She spun quickly, a smile on her face as she lost herself in the motion of her body going around.