Hello, I am a pretty novice cosplayer but experienced in robotics and electronics so don't worry about too much technical stuff. I am going to Anime Boston this upcoming spring, and am going to do a cosplay of Nate from Yokai Watch. I understand how to make most of the cosplay, but need help on one idea. I have no clue how to make Whisper and other yokai into inflatables that can be mounted on my back.

Whisper for reference

I want to make it similar to a inflatable dino suit or something, but instead be connected to a portable pump(like those that pump up air beds). I have already theorized a mechanism for swapping the air flow, just need help making the inflatables themselves.

Best