i like the idea of earth vs mars, its always earth vs colonies....
as a name for the protagonist, how about, well...i donno.
as for the gundam itself, here some input-
i like how some gundams, like the O.G. have beam sabers in the "backpack", and it looks cool. but this might be a bit overused.
in keeping with the tradition, it needs to be the colors of white, red and blue, of course.
weapons, i think, should be Beam Saber/javelin x 2, "armor-scnider"-esque combat knives x 2 Beam Submachinegun x 1, head vulcans x 2, machine cannons x 2 (in shoulders) and a spread beam, like the DOMs had in 0079.
sorry, im not in the story-telling mood.