Mobile suit gundam IBO X OC

*Warning I do not own this show, the characters, or mobile suits except the ones I've created*

In roughly 300 years have passed since the end of the great conflict known as the "Calamity War." The Earth Sphere had lost its previous governing structure, and a new world was created under new systems of government. While a temporary peace had arrived, the seeds of a new conflict were being sown in the Mars Sphere, far away from Earth. Our hero, a boy named Mikazuki Augus and a girl Marceline Dalton, belongs to a private security company called Chryse Guard Security (CGS), but as for Marce, she was a former AKB0048 80th generation lead dancer until she was given an mechanical right arm do to one accident until there was another accident that happens to make her separate from her team and was presumed missing at the age of 14, yet nobody knows that she is in hiding in the CGS facility disguised as a boy, but was soon found out as a girl by Mika by accident. The company accepts a mission to escort Kudelia Aina Bernstein, a girl who seeks to liberate the Martian city of Chryse from the rule of one of Earth's major powers. However, the military organization Gjallarhorn attacks CGS in order to nip this rebellion in the bud. CGS begins an evacuation, using Mikazuki and the other children as decoys. Orga Itsuka, the leader of the boys, decides to take this opportunity to rise up in revolt and launch a coup d'état against the adults who have been oppressing them. He gives Mikazuki and Marceline the task of repulsing Gjallarhorn, and Mikazuki enters battle using the Gundam Barbatos, while Marce operates Gundam Hikari, mobile suits from the Calamity War era which has been serving as CGS's power source.