The RMS-009 Septem is a mass production high mobility mobile suit developed by the Space Revolutionary Army (SRA) for space combat. The Septem shares similarities with the RMS-006 Jenice, this is due to the fact that the Septem is an enhanced version of the Jenice. One prominent improvement of the Septem over the Jenice is the addition of large thrusters on the Septem which are installed on the mobile suit's legs. These large thrusters allowed the Septem to achieve higher mobility and performance than the Jenice.
The RMS-009G Septem Kai is the ground combat variant of the original space use Septem. The Septem Kai is identical to the original Septem visually aside from a different color scheme, however the Septem Kai's parts and systems are modified for combat under gravity. Like the original space combat Septem, the Septem Kai has greater performance and versatility than its Jenice counterpart, the RMS-006G Jenice Kai, due to its large thrusters which allows it to move much more quickly than the Jenice Kai under gravity.
The Septem Kai's primary weapon is its giant bazooka which possesses high firepower. For additional firepower, the Septem Kai is also equipped with 50mm torso mounted machine guns.
The Septem Kai can optionally be equipped with a 100mm machine gun which fires physical rounds and possesses less firepower than the Septem Kai's giant bazooka.
The RMS-009 Septem was created by the Space Revolutionary Army (SRA) sometime prior to A.W. 0001 (presumably during the 7th Space War) as an enhanced RMS-006 Jenice. The RMS-009G Septem Kai was the ground combat variant of the original Septem and was deployed on Earth by the SRA during the 7th Space War. Both the ground and space variant of this mobile suit was deployed throughout the 7th Space War by the SRA alongside the less advanced Jenice, and later the more advanced RMS-014 Octape.