you're not overthinking it. it's a one-two punch of 1a) characters of color hardly ever being drawn with their ethnic features, and often looking like recolored white people (or whatever the "default" is for the setting) 1b) being giving "more interesting" coloring than the dark/brown eyes and dark hair the grand majority of nonwhite people have without any thought about how genetics play into that (having a white parent or heritage will often lighten skin and hair colors, but not to the dramatically pale, light/blond hair with blue/green/gray eye color level you often see in east Asian media featuring mixed characters. it's not impossible, but not very likely either). and 2) in the instance of this series, the author may not have thought about the implications of giving the character those features. unless it's leading towards a "I'm not Native enough for the Natives, and got bullied for my beautiful blue eyes, boohoo" #mixedpeopleproblems setup...

I js realized I ain’t EVER seen another native person with BLUE eyes irl. Like? Maybe I’m overthinking it but is that lowk white wash? Anyways jujucat plz drop it don’t post this white savior slop
Like I live on the Rez but HEY I’m js sayin I ain’t ever seen one.. js throwing it out there..