Midian

First mentioned in Day 157.

A race. Their entire body is covered in a metal shell, similar to an insectoid's exoskeleton. Basic characteristic of metal Midians. This is both their main weapon and personal armor.

Since it symbolizes the Midian, there are some differences between individuals and it’s something each one of them holds great pride in.

An example is Ballark Barak, from the   Atarakua Demon Empire   and is the fourth ranked amongst the   Six Chief Generals.