I like that relaxed tone while building something sinister.

Excellent.

Thank you folks. I was very happy with the last line – it came into my head midway through and totally sealed the deal.

This is lovely. Really well done.

The cold, almost clinical tone of the voice we hear, almost completely provides the scared, incoherent whimpering of the voice we don’t get.

Fantastically sinister, and really quite a scary through.

Thanks for that!

man these just get better and better i mean you can see how your writings are going nuclear but you are useless to stop it

Scary and sinister yes. I think you could scratch the expositional stuff in the second para “you’ve rolled over; you’ve turned on the light etc” and found ways of letting the demon possessor character flex his muscles a bit more.