The story an the action happens inside the human body from the perspective of a FPV (first person view). To keep the story consistent, the whole mission inside the human body happens through a some sort of submersible vessel. It will be similar to a robot suit with submarine capacities and control.
The player will be seated see in the main panel of the RoboPod. The RoboPod will be similar to a personal submarine.
Here are some one-man submarine image references:
This submarine is great for the form factor, open view glass sphere and the tubular harness gives the feeling of sturdiness and functional working machine. 
This Robot-Suit fits perfect for the submersible vessel. Get rid of the minion. 
A more flashy carcase for the submarine module. Probably will block part of the vision view. since the yellow carcase is bulky and big. 
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