Interesting concept, and one that I entertained years ago. One thing that worked well in my film "រឿងកូនពស់កេងកង" that you may want to try when shooting your "devil" is the Dutch camera angle as it subtly reveals to the watcher that something is amiss with this character. Good luck.
Abaci - Best film short-feature with you. You be lucky to live in the United States of America, easy to film. I like it that corresponds to beverages with shirt color, very smart. I suggest you to tighten synchronization between changes to make much more fun. Not funny a pause between dialog. Let the man of fat dialog begin over fiend, now cut. Work hard and it will good. I look forward to two victory.
FaiSamAng - I see the movie "kuon puo Keng Kang" Film Festival Romanian, hat great snake! Please do another movie of a snake.