Kidou Senshi Gundam F91

A teenage space colonist named Seabook Arno becomes involved in conflict after being compelled to pilot the F91 Gundam, a machine partially designed by his estranged mother, Dr. Monica Arno. His girlfriend, Cecily Fairchild, is connected to the Crossbone Vanguard, a militia led by her grandfather, Meitzer Ronah. This group seeks to create a new aristocracy called "Cosmo Babylonia." The narrative follows Seabook's reluctant participation in the resulting struggle.