He is exhausted, bloodstained, and guilt hangs heavy on him like it always does; the strain of doing unforgivable things in the hopes that he can do some good, that he can help bring it all to an end forever. For the greater good. Hermione still cannot reconcile herself to accept the idea of making sacrifices in the name of the greater good. She cannot approve of how the Order is using Malfoy. Not because of what Malfoy does – if he didn't do it, another Death Eater would, and without the mercy he tries to provide where he can – but because of what it does to him. Staining his soul irreparably. Giving him this guilt.