The kayou, one of the mushi's many forms, would be written as 花陽: a made up word that is a silly pun on my part, but also pretty as a preexisting woman’s name.
The village is named after the mythological creature/constellation of
Suzaku. The embroidery Mie does is of this bird on night-black silk. Blame all the flame and flight imagery on this decision.
The cranes at the end are probably carriers of the mushi, because they fly ridiculously high (10,000 metres?!!?!?!) and also because they are a popular kigou motif for autumn, longevity, fidelity, etc.
I had originally planned the kayou as a kind of rare nagaremono. The species had something like sexual dimorphism between small earthbound suns that are pollen-sized, and skybound ones that are much larger, but it eventually developed into a mushi that also devours fear. I don't know why, but eventually the fic became (for me) about epistemological and existential concerns. Light, dark, living, dying, longing, flying, love, blah blah. Rou must be the reincarnation of a bird, or something.
Ginko knocks on the fourth wall, too, what with the grin and reference to the "previous episode". It's mostly an inside joke with myself.
The process of writing this story was strange; the first bit came really easily, and I wrote 3000 words in an afternoon and a night when nearing the deadline, but it took me weeks to come up with the ideas!
Hopefully I didn't forget anything salient about my making of this thing. It's always fun to look back on development notes!
In other news, I have been writing a Mimi wo Sumaseba post-canon fic, about Shizuku and Seiji's adventures in Western Europe, because I finally got to do some field work in my February holidays to the region.
It's 24K now, after some editing, but I refuse to post a word of it until it's all done. I get the feeling the end length will be somewhere around 30K, and I'm setting a tentative release date for the 8th of September.
I think it's hilarious that I have put such an inordinate amount of effort into this fannovella, when probably less than half a dozen people will likely read it.