These character designs kind of, er, bug me. While they sit into the cute and quirky category that works out excellent for a 4-koma series, their insectoid physical features appear to be more relevant to their personality traits than anything. Which isn't inherently bad, but then you end up with designs that literally look like half a spider/scorpion bolted to their head. The little action shots in the character design sketches are much more interesting, where they're actually using their distinctive qualities. (Compare and contrast to the Jingai Shunman series [which is H].)