Takarada Rikka and Shinjou Akane are the two female leads of SSSS.Gridman who are grabbing the attention of fans due to their extreme attractiveness. The characters were clearly designed with the other in mind, as their proportions are more or less inverse from each other. Rikka is more bottom-heavy, with bigger thighs and a slim torso. Akane’s design emphasizes her upper body by having a large chest and skinny legs. They’re made for thirsty fans to draw lines in the sand, based on which features they’re truly drawn to.
The decision to create these contrasting designs might be a bit of a double-edged sword for the staff, however. What I’ve noticed is that the anime itself, as well as its merchandise, has trouble keeping track of the visual distinctions between Rikka and Akane. In any given image, Rikka might be portrayed as extra busty, or Akane might be drawn as voluptuous from top to bottom. If this were fanart, it wouldn’t be much of a surprise—it’s not uncommon to see fanartists give characters whatever proportions they want. But these are the show’s own artists and animators flubbing.
Anime, because it involves so many hands and a whole lot of outsourcing, is prone to inconsistencies, so this is not a criticism of the skills of any of the staff. What I am saying, then, is that Rikka’s and Akane’s designs are especially troublesome for animators and artists because they’re not how anime typically creates contrasting female characters. Usually, busty girls are thicker all over, and less chesty girls are more svelte all around. If not that, then designs will feature the same basic body type overall, even as the characters change in specific areas.
Because anime TV production is notoriously crunch-heavy, I could see a lot of artists and animators having to default to their natural instincts when drawing characters. If they’re not accustomed to drawing characters with such clearly defined proportions like Rikka and Akane, then it would be all too easy to draw what “seems right.” And because Rikka and Akane are not wildly different from each other (unless we’re talking fanart), they also can’t exaggerate to the point of caricature either. It’s a tough middle ground to strike.