Another Koopa-Broodal concept, this with a circus flair. Ignoring the abysmal DPI of this image (which is most likely how it is rendered in the book), I want to point out how one of these is LITERALLY just Lemmy. And while I love the species and find clown characters interesting, this just...
Considering all Birdos wear bows and makeup regardless of sex or gender, that part may just be a cultural thing.
Worth noting is in BS Super Mario USA all three are self-identifying males that just act really feminine, like Vivian in the Japanese version.
She comes off as an emo (or at least really shy) teen to me (though I understand the confusion with the Bo Peep bonnet). The big one might be middle aged, or she might just be like Grenda from Gravity Falls. I'm gonna assume the small one's a child, and the one on the left looks somewhere in the...
Some Broodal concept art I found interesting.
Aside from the adorable Buzzy/Bob-omb girl, the most notable thing with this one is the use of Rocky Wrench's original "Koopa" design before they were retrofitted with Monty Mole characteristics, suggesting a return to that design.
Also, Koopa...
"To adopt advanced technology."
"To rank first among similar products."
"To denounce the evils of truth and love."
"To extend our reach to the stars above."
Resembles a Dodongo (Snake) from Link's Awakening.
Beaten the same way, too.
It might just be a really short millipede, an isopod, or the aforementioned tardigrade, though.