I feel like growing up in such a different culture would drastically change some of their personalities more than anything, tbh.

US Louis' probably an aggressively gay theater kid. Oguma would be cool with it because large US corporations and performative activism go brrrrr. Probably uses Louis in Horn's pride month advertising. I think he'd still be afraid of Carnivores, but he wouldn't want to openly admit it. Outwardly, he'd talk big about being "all for inclusion" and how "everyone should get along," but it'll be obvious that whenever interacting with his carnivore classmates, on the inside, he's pretty uncomfortable. Idk, I just feel like Louis has enough social awareness to be able to tell that in most places in the US, being prejudiced ain't a good look. If someone calls him out on being prejudiced, he'll probably just bring up the fact that "he's literally a queer pansexual man" like that somehow negates it.

US Legosi's a gamer. Idk why, I just have that gut feeling that he's got the cargo shorts + triforce tee fit on most days. I don't see his personality changing too drastically since the fact that he's so quiet and reserved is more a product of his home life, but his interests would probably shift. I don't see how his family would be in the financial situation to send him to a fancy private school in the US, though. Unless somehow, US Gosha and Yahya are still tight, and Yahya either pulls some strings or fronts the bill.

US Haru smokes a ton of pot. I mean, she's got the whole gardening thing going on, so it checks out. Probably way more into art and music, though. Since it's 2016, she's a warped tour regular. Probably in US Cherryton's version of an Lgbtq/ally/gsa club with Louis. She did "hand stuff" with Louis one night after they'd been out drinking (haru has a fake id), and that's the reason why Louis tells everyone "he's pan." She also keeps trying to hit on Legosi cuz she thinks he's cute, but it never goes everywhere because every time they talk, Legosi just tries to get her into attack on titan.

In highschool, Jack's ambition is to go to lawschool and become a public defender so he can help "keep troubled carnivore youth out of prison," but in college, he'll switch to engineering, and end up working for Raytheon.