@Wanderdoodle No? I don't know how you see it that way, but chiyuri has been given the abilities of several types of cockroaches, i'm too tired to go back and look them up, but also, setsuna has a dinoponera's abilities while also having the friendship capabilities of a megaponera.
My theory is that the unimportant characters that play side roles are the ones that are based off of singular bugs, while the main characters get multiple creature powers. Also, some characters might not have revealed their multiple bug spanning abilities yet, this manga has only 6 chapters, and the two (three?) MCs haven't met yet, so its still in its early phase.