Beautiful thread Neiteio, just beautiful. I played on the Wii U which makes it pretty annoying to take screenshots so I appreciate all the beautiful pics. You commented on two things I love about BotW, and that is having children of all races, and the Gerudo in general and Riju particularly. It was the first of the four main zones / divine beasts I did, so my impression was even stronger for that. Just a 11/10 all around, the beautiful town, the insanely varied NPC models, everything. Besides Riju and Urbosa, I also loved Buliara, Riju's bodyguard.
Also your collection of pics made me realize something I hadn't before: all of BotW's Gerudo have green eyes. This is interesting as Gerudo in OOT had golden eyes, including Nabooru and Ganondorf, but also because all seem to have the exact same shade of green, even when there is so much variety in everything else, so one wonders if there's something significant about that.
Speaking of variety, your pics also show that many (but not all) of the Gerudo have lips in a shade of green (and in this case there is quite a lot of variety). Perhaps the non-green ones use lipstick (wouldn't be surprising that they adopted it from other cultures). In particular, it seems that Riju and Urbosa seem to have the exact same shade of lip color, a dark turquoise green/blue, and nobody else that I can see in your pics seems to have that color. As far as I can remember it's never hinted that Riju and Urbosa are relatives, right?