The Rising Gundam's overall motif is that of the samurai's wife, who defends the homestead with bow and naginata. It makes sense for Rain to use it, except that the show says it was made for Ulube, and Rain appropriated it.
The naginata is traditionally the weapon of a samurai's wife, yes, but the samurai himself was just as likely to use a bow (in fact, the longbow was originally their signature weapon, before the katana was even invented). And it wasn't until the Edo Period that the naginata became associated with women; for centuries beforehand, it was a common infantry weapon.
The episode where Domon battles Chico Rodriguez, the Fighter for Neo-Mexico, seems almost tailor-made to make a viewer's brain hurt:
The whole plot of the episode is that Chico doesn't want to be the Gundam Fighter and abandoned his position to he could spend his sister's last year alive in the Mexican sea, like they always dreamed of. If that's the case... why did he volunteer to be the Gundam Fighter of Neo-Mexico in the first place? Why not just migrate to Mexico territory without getting involved in the Gundam Fight?
For that matter, if he wanted to run away from the Gundam Fight... why did he keep the Tequila Gundam, as opposed to just leaving it where the Neo-Mexico government could take it back?! The episode literally calls out that the major reason Neo-Mexico is chasing Chico is because they're looking for the Tequila Gundam; if he'd left it where they could have retrieved it in the first place, they'd have just replaced him with a more willing pilot and swept him under the rug, whereas taking it forced them to chase him down to at least get their property back.
How exactly is being the Neo-Mexico Gundam Fighter even interfering with Chico's desire to live in Mexico in the first place? Fighters are shown to have all the freedom they want to act on Earth in between matches so long as they continue to obey the code otherwise. All Chico had to do was obey the rules and kick the ass of any Gundam Fighter who showed up looking for a match; he could have spent his days sailing and fishing to his heart's content in between bouts.
The Characters constantly screaming the names of their moves might seem like typical Shonen anime fare, until you realize the suits they're piloting don't have any discernible switches or buttons in the cockpits, and due to the way the users control the suits it wouldn't really work out if they did. The special functions and weapons on them might be voice activated.
Domon is the only Gundam Fighter that doesn't look like an ethnic stereotype... until you notice that he's a martial artist obsessed with family values and honor, and that his Gundam has a fairly stardard look because the average Gundam always looked like a Samurai.
Alternatively, while most Gundams in the gundam fight were probably designed aesthetically to display a certain amount of nationalistic pride or recognizability, Neo Japan was mostly focused on creating something that could just stop the Devil Gundam. Look at the Master Gundam compared to the Kowloon Gundam.
Also, Neo Japan itself picks up the slack quite a bit when the Devil Gundam takes over the entire colony, effectively turning it into a giant tentacle monster.
To continue this trend, Shining Gundam and Rising Gundam all take some inspiration on Japan's nickname of "Land of the Rising Sun". Even God Gundam's dub name of Burning Gundam hasa the same effect. Meanwhile the God Gundam was made not just to enhance Domon's capabilities in the Gundam Fight but to fight against the Devil Gundam.
If every Gundam fighter is a national stereotype, why is the German fighter a ninja? Because he's actually Japanese. In other words, he's a Japanese stereotype disguised as a German stereotype.
The original Schwartz dressed the same way, though, suggesting that he was also a German McNinja.
A little something from Mobile Fighter G Gundam: Domon's crest may seem out-of-place, but come the last episode, it makes perfect sense.
Towards the end, Ulube calls Domon the Knight in Shining Armor to rescue his princess Rain from him, the evil sorcerer. Usually, there's another obstacle for a knight to his fair damsel. Look at the remains of the Devil Gundam at the end, does it remind you of anything?
During the Lantau Island Battle Royale, Chibodee and George, who represented Neo America and Neo France, respectively, teamed up against the Grand Gundam, which was piloted by Neo England's Gentle Chapman. This could be a nod to the Revolutionary War!
When the other members of the Shuffle Alliance reveal their secret techniques, Chibodee and George outright reveal theirs to Domon while Sai Saici and Argo planned to use it during their fight against Domon (I say planned because Argo had to reveal it early during a fight). With Chibodee and George, they were the honor bound fighters who revealed their specialty techniques to Domon to see what crazy maneuver Domon would do to counter them. As for Sai Saici and Argo, they have something they are willing to fight and put their lives on the line for so they planned to reveal it during their fight, but both had nearly fatal side effects.
Another aspect may be directly tied to the nature of the techniques. Wheras Rose Hurricane and Bursting Machinegun Punch are both simple expansions on the original techniques, the Shin Ryusei Kochoken and Zero Range Gaia Crusher both are entirely different techniques that are completely separate from the original signature techniques of their suits. It may be that George and Chibodee were more willing to reveal their moves because they were already familiar techniques to Domon, only much improved, so he already knew what to expect.
Jean-Pierre Mirabeau is explicitly using a leftover from Chapman's days in the Gundam Fights, where the Mirage Gundam is heavily decked out with loads of munitions and firepower. It's infamous for causing collateral damages against civilians by firing missiles into the surrounding crowd. No wonder the Earth is a Crapsack World; previous Gundam Fights were the equivalent to being like specialized, smaller conflict scale versions of other Gundam series wars!
When Gentle Chapman reappears in the finals, his wife Manon, who was intergal to his character is nowhere to be seen. She's probably unaware that the Dark Army reanimated his corpse. She has no idea they went grave robbing and are using his soulless body to try to attempt complete genocide. And she loved him so much...
Another one is the Mobile Trace System that follows the pilot's movements in combat. In several fights we see some of the Gundams get dismembered, decapitated, impaled, and more. Now remember that the pilot is feeling these attacks.
Mitigated somewhat in that there appear to be limiters in place that take attacks from "fully feeling the damage dealt" to "hurts like hell"
As fearsome as the Devil Colony Gundam was, just remember that was when Rain was the pilot. If Allenby had been put there as Wong planned, that would've been it for humanity.
Politically speaking, Neo-Japan is going to be in a terrible situation in the aftermath. Even if Ulube had gone rogue, the Devil Gundam was Neo-Japan's creation to begin with.
Since G Gundam is the one of the two series in the franchise that employs nanomachines, this is likely the series that led to ∀ Gundam.
Earth is still kinda fucked over by the end. Even if everyone somehow agrees to an armistice in the aftermath of the Devil Colony Gundam incident, the world has been devastated by generations of Gundam Fights, never mind the pollution and damages prior to the colonies becoming a thing. The Devil Gundam is gone — but the world would require a lot of extensive change, and if taken with ∀ Gundam in mind, it'll take the end of societal civilization, the destruction of the colonies or lost contact at the minimum, and most Gundam and Mobile Suit technologies disappearing from Earth entirely before the world can repair itself. And that's if society doesn't decide to try to build another world-repairing ultimate Gundam just like how the Devil Gundam started out.
While it's a Foregone Conclusion that Gina, sister of Neo-Mexico's fighter Chico Rodriquez, died offscreen, one would hope she passed peacefully and not during the Devil Gundam's final rampage.
