Random ahh but I've always thought that Garuru and Giroro's family was probably like immigrants or just from another place in Keron which would be more "western" than where they were shown to live during their childhoods (which I'm guessing is the equivalent to Japan).
Idk I think this headcanon I've subconsciously always had is mainly because of Garuru's portrayal, especially in chapter 183 (I love this side of Garuru so much I can actually remember this specific chapter number after years 😭), where he comes to Pekopon/Earth to visit Giroro for his day off :]
So in this chapter there's this scene where they're all uncomfortably eating lunch with the guy there who is struggling SO HARD with the chopsticks LMAO like maybe it was because the specific food in the plate was slippery but idk everyone else seemed to be doing just fine.
Also I may have some inclinations towards an "USA version in Keron" it's where they might have lived previously, or have some kind of heritage since Giroro's afro/hair is shown as blonde! And although I know this is stereotypical as hell, it's a comedy anime from the 2000s and there's always this Japan-America focus anyway idk 🥹
And this part now goes heavier on speculation/personal headcanon but I like to think that their parents used to live in this "Western Keron" place and Garuru lived most of childhood there but they ended up moving to this "Japanese Keron" side around the time Giroro was born for X reasons.
So Giroro adapted quite well to the place, the habits, the culture etc. I feel like he's always a bit on the awkward side anyway but he managed to get friends and he doesn't seem to have difficulties with simple stuff like Garuru with the chopsticks.
And I know Garuru iirc was like, super popular during highschool or wtv but that probably mostly came from his skills at the military school. On the other hand though, he's rarely shown or mentioned to really have had many friends and it's actually more often shown that he's quite awkward and antisocial like Giroro, maybe a bit more (like the whole being in his room alone, blasting metal music like an emo teen).
And how does this have anything to do with the whole chopsticks thing? Well, I personally think that it shows how Garuru hasn't really properly adapted nor is very socially skilled... (He's so me fr) He probably hadn't managed to make any friends when he moved, which means he mostly just focused on the school/military stuff instead of socialising and getting more fond of the different cultural things there (chopsticks...).
On a similar note, I think he's always been very socially unaware and awkward since always anyway. He doesn't seem to really read well into more personal, social clues when it comes to other people (see him being completely unaware of Pururu's crush on him, for example) and maybe he just finds it funny or something but I personally like to think he doesn't really ALWAYS mean to make people uncomfortable as hell, he's just awkward, doesn't know how to act around people in a more casual, personal way outside of work and his fame and rank makes him extremely intimidating when he's just really chilling (god I love 183 so much GOD).
Well, yeah. Chopsticks, I guess. :∆
