Meet ZI! (Zee) A giant experiment that was created to find out what happens when people that are not Egg Guy, try to connect and build up a person using the shapes created by Egg Guy. Although it kind of worked, ZI had accidentally started a fire in the factory, causing the place to burn down and become abandoned. ZI was too big to be evacuated so they were left in their subject room where they now rest. They're also still alive somehow.
kinda looks like a gd or jsab character