Edwin definitely knew better than to say that wouldn't have been an option even if they wanted it, because for a short while it had been, and they hadn't known it was only temporary at first.

He pressed a kiss to the top of Charles' head, "I know." While it wasn't a feeling he shared, vastly preferring being a ghost -though he couldn't really say he liked being dead it was more the circumstances than anything- he knew that it was important to Charles.

The same way he knew that explaining how many more people they could still help wouldn't actually help Charles right then. It was occurring to him, and not for the first time, that he really didn't know how to comfort much of anyone, but especially Charles, who more than anyone he should have known what to say to make him feel better, but the things Edwin found comforting about their usual state were the things Charles hated, so he only said, "I know." Again, gathering Charles all the closer.