Antonio was fairly certain that Peeves had left the area of his office and it was safe to open the door when he heard the knock, but he wanted to be sure, anyway. The first knock was immediately followed by a second one, a much lighter knock, and he turned the knob to see who it was. A poltergeist wouldn't knock on the door, he would just come through whenever he felt like it, that was Antonio's feeling on things. "Come on in," he said. There was a boy there who he hadn't met yet as well as the girl who had been with Jack at the Hufflepuff table. He was actually thrilled to see her, maybe she could help him with Jack. An idea suddenly began to grow in his mind, if she was willing. If she really cared about Jack and wanted him to be able to stay at Hogwarts, she might be willing to play along. It was worth a shot!