#again it could just be that sunnys parents are strict and have a bonsai and kels skin is dark-

[maeshelix]

Does the game ever mentions their nationality or country of birth?

I've seen some fanarts and headcanons depicting the friend group with being either from a different country they were born or Nationality, an example being headcanons I saw depicting Sunny and Mari as Japanese-Americans, Kel and Hero Mexicans, Aubrey as either German or Korean, and Basil either Swedish or British.

Is there a piece of information I'm missing from some random side quest in the game that mentions their country of birth or nationality?

nope. theres fucking one piece of evidence per family that might point to Sunny and Kel's nationalities maybe? but otherwise no ethnicity is ever directly stated ingame.

for Sunny and Mari, its the bonsai tree in their parents room that their dad had when he wasnt being a fucking deadbeat that you can find during the memory house section near the end of the sunny route.

and that, combines with sunny mari and their dads physical appearances (they all have straight black hair, theyre all pale as fuck [though even the mom is pale as fuck in the family portrait but whatever]), their family dynamic kinda matching the cultural stereotype of asian-american parents being strict and obsessed with academic success (this one sucks but ive seen it thrown out as a reason they think so by people before), and the fact that maris ghost kinda looks like an onryō leads people to think theyre japanese-american.

for Kel and Hero, its this picture alter at the top of the stairs to their house, which google tells me might be a Dia de Los Muertos ofrenda, since thats the only thing that comes up (though this system is white as hell so i defer to any hispanic people who might see this post to tell us what else it could be. either way its not stated ingame what it is.)

and with kel having darker skin then basically everyone else in the game (though the family portrait shows them all having kind of brown tinted skin except for sally), people came to the conclusion that theyre hispanic-american.

For everyone else? its literally just vibes. Aubreys house is a decrepit shithole with no notable cultural items in it, she and her mom look white, Basils house is kinda just a nondescript american suburb house full of plants and we never see his parents and he looks white, every fucking sprite in this game except for the Bread family, the npc Brent, his mom, and the pharmacist, is white as hell so we cant really tell with them. its almost all vibes.

and honestly its probably also vibes with kel and sunny too. both of the pieces of "evidence" i showed are easy to miss if you arent looking out for them (or if you arent obsessed with this fucking game like we are) so its just as likely that asian and hispanic players saw sunny and kel, saw traits that they shared with each character, and basically went "oh hey same". and thats probably what it is for the other characters too.