The RMS-006G Jenice Kai is the ground combat variant of the original space-use RMS-006 Jenice. The Jenice Kai's parts and systems are modified for combat under gravity, and many of the original Jenice's verniers are sealed due to their ineffectiveness under gravity. In addition, the Jenice Kai's shoulder armor has a smooth surface, and does not feature spikes like the original Jenice.

The Jenice Kai's primary weapon is its 100mm machine gun, which fires solid rounds at a rapid rate. For close quarters combat, the Jenice Kai can be armed with a heat hawk. Additionally, the Jenice Kai also mounts two machine cannons and two vulcan guns on the mobile suit's torso. These four torso mounted rapid fire weapons provides the Jenice Kai with extra fire power.

The RMS-006 Jenice served as the Space Revolutionary Army's (SRA) mainstay space combat mobile suit for the early stages of the 7th Space War. Like its space counterpart, the RMS-006G Jenice Kai was mass-produced and widely used by the SRA on Earth during the war. Despite being out performed by later mobile suits of the SRA during the 7th Space War, the Jenice continued to be operated throughout the war as the SRA's main mobile suit.

After the cataclysmic war, a number of Jenice Kai mobile suits survived and found their way in to the hands of various factions. A number of these Jenice Kais were claimed by Vultures. Many of these acquired Jenice Kais were customized in various ways by different factions and people.

One notable group that used the Jenice Kai in A.W. 0015 was Satyricon, a group of space colonist who opposed the SRA.