Is it all right for Sam to use his abilities to heal your character? The Nogitsune eats pain and would be very upset if he did, but go for it.

Is it all right for Sam to use his abilities to hurt your character? Yep. No telling how it will react. Might even like it.

Any other notes? The body really isn't the Nogitsune's own since it doesn't have a body. It just happens to be possessing it. No idea if that affects anything of Sam's or not.