Technically, Nessarose wasn't allowed on the grounds of Hogwarts, or even in the castle. Yet, there she was, sneaking about like a proper rogue and doing her best to remember where exactly everything was located. It had been a while, obviously, since she had set foot in the school, but it felt rather like riding a broom - if you get used to it, you can go back to it with a bit of ease. The real difference had become her status as a werewolf. She was wanted by the Ministry, as all magical creatures were, yet she had chosen to fly in the face of authority and show up where she wasn't supposed to.
She had waited until after the dinner in the Great Hall finished up, quickly making her way into the building once things had grown quiet. She needed access to the library, to the room of requirement, and the student dorms if she could manage it. As far as she had heard, most of the students at Hogwarts were highly against werewolves. It was just lucky that no one knew about her having been turned. After all, it had happened over break, and she wasn't exactly close to anyone at the school before she left. If anyone even remembered her, she would be surprised.
That wasn't to say she expected to make it through the castle without being spotted. She could only hope that, if anyone did see her or recognize her, they wouldn't ask where she had been. Maybe she would be lucky and they would just remember that she was in Slytherin, and let her pass by.
Then again, Nessa had never been very lucky.