"Professor McGonagall?" Harry appeared to completely forget the fact that they had just been arguing, and his face lit up at the thought of seeing their old Head of House again. It had been well over a month since the last brief time they had seen the ex-Gryffindor Head of House, as she refused to leave Hogwarts – spending all her time in the Room of Requirement organising small raids and rescue parties into the hallways of her beloved school.