"if I write to you," Hermione says as the idea suddenly occurs to her, taking a step closer to him. "Will you write me back?" It is not him leaving with her, but it is something. It is a least some form of communication until Hermione can convince Kingsley to order Malfoy to leave, and join the Order's base of operations, and she will take it. It's better than nothing. Malfoy's drawn features seem to grow even more bleak, and he looks away.