The KIS units were always worn when doing physical labor and freight movement and deliveries. They greatly increase the physical power of the user without requiring any power. When a space port was attacked long ago from a force consisting of standard bandits and light tanks and mechs, the soldiers who were defending had to come up with a plan to hold them off. They decided on using the KIS by welding armor plates around the units offering more protection. They welded various kinds of weapons to their arms and hands from rivet guns, mining claws or lasers, welding torches which were set to push pressurized gas outwards and any other things they could find. Their militia of knock off mini mech warriors impressed the empire and the KIS was developed to become a powered unit for combat.

The KIS-01 is composed mainly of thick hardened steel using mainly gears and springs to induce power free movement. It was the standard for a long time as technology slowly improved the suits themselves.

The KIS-02 is an upgraded version of the KIS-01 in every way possible. It has rivet points and an improved cage unit which can enclose around a unit allowing for armor to be secured to it. It has a large battery pack which holds a 4 hour charge allowing for powered movement and operations wearing the heaviest armor suits. Unfortunately this unit was known as a Popping Turtle, being with the large backpack like exploding bomb on a soldier's back. It also required attached armor pieces to either have no back armor or greatly reduced back armor due to its sheer size.

The KIS-03 had a new battery pack system which has 5 smaller battery units linked together by thick cables in a spine-like pattern down the back side of the armor. This new system extends the battery life to 10 hours. Even more protections were added to the back plate to stop those unwanted fireball turtles from appearing on our side. This allowed for other suits to be worn without the large exposed backside. The armor is further strengthened to improve durability in the field.

The KIS-04 has a large back piece which makes up the entirety of the suit's power system. It has a built-in radiation type charging unit which can absorb sunlight or other radiation and convert it to a charge. The thinner and larger unit allows for a 14 hour charge with a slow charge movement system which generates a low charge as the unit moves with a gear mechanism installed on each leg. It greatly reduces the power consumption by 15% each leg as the unit walks. Improvements were made to make this unit the most well fitting unit with extendable crossbars to fit any size and race of people in the empire. The only downside to this improvement suit is the required power to do simple tasks, therefore a large power cable held overhead by a winch or crane can make workloads easier.