Grell will be unaffected. He's pretty well completely remorseless. But he's going to have a FIELD DAY reaping the NPC dead, for old time's sake.

He'll even reap your character, if you're so inclined. I have in mind a Monty Pythonesque Bring out your dead scene with Grell trying to reap the not-quite-entirely dead, and having to be restrained...