They all knew who they were since Draco had broken down and told them that he had been working with the Order. He told them that the plan was to infiltrate from the inside and Hermione was the key to everything, but he had been kept in the dark about her heritage, and he had no idea what she was talking about as far as the tether. When he had sent his report to the Order he had included what she had said that day by the fire, but it had been almost a week and he had received no answer.