... [ he lets emet takes his hand as his gaze burns a hole through the snow and into the ground. ]

Does that mean you intend to stay in hell, ..? Or are you going to see if making that wish includes you too? I doubt sensei is going to want to leave you here when he graduates, unless he plans to make a similar wish. Although knowing what he knows now about the end of the world and the commission... [ he's unsure what five plans to specifically do. all childe knows is that if he asks him to help him kill anybody he'll do it. he may not have made a promise, but he absolutely would. ]