I can only assume KC was going for a very stark contrast in form, going from the very monstrous looking greenworm to the very human looking papillon.
And I can (not to mention will) assume that this pretty much happens to be an "evolution" of his drawing style and most of his animal based/kemonomimi entries feel more fitting to be seen roaming around Comiket than in a middle age/fantasy-esque setting.
Like entries such as the Devil Bug (who went from Cockroach based moster girl to Idolm@sters' Yukiho Hagiwara) or the Thunderbird (who feels more fitting in Organization XIII's roster than in a middle age setting) have kinda proven before...
...But yeah... Strike of genius there.
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Moving onto serious matters now...
The first thing I should do is slightly rectify myself... This girl is actually a SHINY.
You've only got 1/4096 chances of marrying one of these
As I mentioned before visually wise she's stunning (truth to be told, that's his main selling point after all), I'm not specially fond of her colour scheme as I think something more vivid would suit her better but hey... Nice effort and gotta love those pantyhose (now I desperately want to see a moth(wo)man wearing white, silver or even lavender coloured ones).
As for the entry itself? I'm not gonna say I'm disappointed (since that would actually mean I had expectations on this one), but definitely feels off... The profile feels unnaturally stretched for no good reason (almost the entire profile could be summed up like: "They love their husbands and they're perennially yearning to bear their children", that could have been explained in one paragraph (or less) and use the rest for actual development) and the only interesting bit of information feels extremely rushed and put there at the very last minute as if he almost forgot adding it... So "Cutiepie" can evolve into "Bridefly" on her own... And can even find a potential mate even after evolution... Fine, but for crying out loud,
tell me how!,
elaborate a bit more on her behaviour and modus operandi.
Overall... it feels that all that "foreshadowing" done in the previous entry pretty much went into total waste in the end.
The lass is bland, boring, unispiring and her profile is poorly executed (to put it softly), but at the very least is a nice good ending and she feels like could become a decent choice for "teamwork" interactions (like for instance sharing a partner with her "cousin" or paying visits every now and then to the neighbouring Dryad and/or Alraune).