(Since I tend to get asked about selling the Shinigami, Rem and Ryuk have been sold. But hey, you can make your own!)
Originally I was going to sculpt, mold and cast a latex suit, but after sculpting and making the torso, I hit a block. My mold locked and I couldn't get it open! I still wanted to make Rem so I took a different route to make a faster, cheaper costume.
In a nutshell I made a bodysuit, glued craft and upholstery foam and backer rod to it, covered it with latex and repeated this method for the feet and hands. I also made a wig and face (chin and nose) prosthetic. It's not as detailed as I would like, but overall I am very happy with the results.
This costume was constructed in about two and a half weeks, so you still have plenty of time to make it for Halloween :)
For this project you will need: