① I think there's a step at the shoulder, but since it's planned to be made as a single piece, this part won't have such a distinct step and will likely be more flat. ② Regarding the gradation in this area, it will probably be recreated using leather & paint. Therefore, there is a possibility of slight color variations. ③ This is the part of the costume that I'm most unsure about the structure. I'm thinking of making the jacket by overlapping the shape circled in red in the third image. Would that be okay? I think the black and blue lines would look good if they stopped at the sides without going all the way to the back. ④ This part isn't separated in the illustration, but I'd like to make it openable with either an open zipper or hooks.