That would be awesome and I'd love to play the ensuing guilt! The only thing that concerns me is that Kevin would try to exorcise the impure spirit ~ as soon as it came out. I mean, if the Noah pings demonic. I don't know how D.Gray-man Noah compare to Makai Ouji demons (the joys of panfandom!). So if you wish his headmonster to play around, it might be better to dodge the smiting angel as soon as healing happens.