Now for some quick planetarian mech design. So with real life fiddler crabs a defining feature is how males have one claw that’s significantly larger than the other. This is reflected in the railgun mounted on the right side of the machine with a much smaller apparatus on the left.
Comparing the rough and the CG, you can also see the differences in the cannon’s folded up and deployed modes. Suzumoto tweeted out that this was in the original design. It wasn’t something made up for the anime. If you look at the deployment sequence in the anime, it pretty much opens up like a crab claw too.
It’s fascinating how intricate the planetarian designs are under the hood. I recall a time when Suzumoto like tweeted about Yumemi’s weight (several hundred kilo) and how most of the tech went into her upper body so she could express herself. Her lower body is then pretty shit because she was never intended to do anything but walk around in a confined area. And like none of this stuff is told in the text or had any significance until 12 years later.