Mason walked into the Potions Classroom, giddy to be back in her favourite subject ever. She passed where Professor Newton always sat and noticed that little rat of his.
"Animagus. . ." she whispered before giving the rat a salute.
"Good Evening, Madame Curie. I hope you don't die from radiation-poising like your namesake."
Mason strode towards where their lab coats hung and snatched the one that had her name written on in her overly-girly script.
She made her way towards one of the tables and pulled on the lab coat, wishing that Professor Newton would just reveal himself as the rat, (again, ANIMAGUS) and start the lesson.