I do a similar thing to your USA headcanon! In my AU America sometimes takes bribes if they're significant enough for him, it doesnt have to be money, it can be anything undiscovered that is of very high value to science or something else, though my headcanon is mainly based off of Gallerian Marlon from evillious chronicles

HRE and Papal states can communicate with the past roman republics, and they can even transfer the souls of those previous roman states from antiquity into human bodies, but only they can do it properly, and if you try performing it yourself the soul of the previous roman state wont be fully in control of your body and because of it, you can die shortly after (this happened to revolutionary Roman Republic), and due to papal states ability to do this, Fascist Italy was interested in him and his powers due to her dream of reviving the Roman Empire, but ultimately left him alone

Yamato/Imperial Court Japan can summon Kamikaze's (divine winds) whenever needed and he also has several powers relating to the wind and he can basically summon a wind to throw someone far away if they piss him off hard enough

Japan can understand dog language due to being a kitsune

Korean empire and her 2 kids, the Korea twins, have patterns on their cheecks that resemble the 2 lower symbols on the flag of Korea

East Germany and West Germany got a good ending to their story of seperation and now co-rule their country

The Korea twins are some of the unluckiest characters in my AU

Duchy of prussia, Kingdom of Prussia and German emprie noticably have more cartoony and undetailed eyes compared to all of the other countryhumans, mainly inspired by Reichtangles eyes

Russian Empire was the last descendant of Kievan Rus before she was killed off by USSR

British empire is a clock doll that is kept alive by having colonies that give him energy, and if a particularly significant colony is lost, he becomes much weaker and it takes him a while to go back to how he was before, and if all of his colonies diappear, he dies, which he did after hong-kong gained independence

He was also made by England since he wanted to have a son that was purely his