His smile proved he wasn't the least bit disappointed to find Hermione on her own. As he crossed the room to take a seat next to her on the sofa, Hermione didn't lessen her grip on her wand. They hadn't been alone since the day the Dark Lord died and they both collapsed on the floor of their office in indescribable pain. She was nervous to be caught alone with him again and even a little scared. He could be very unpredictable. Despite years of having an inappropriate friendship with the man, she knew she couldn't afford to get too complacent around him. Part of her wanted to run from his presence, but she didn't want to give him any power over her. Even if it was just the power to annoy.