Alicornutopia

Do trans* fairies exist, or are their genders when they appear all very well-matching and such?

You do know there is a Joker fairy, right? That implies that at least some gender weirdness is allowed. I guess there might not be fairies on the typical male-female spectrum closer to one end in gender but with a non-matching body. I’d expect such things would need to be solved (easily) by sorcery, though.

Well Joker was also a one-of-a-kind and Joker's gender isn't exactly misaligned with their body as much as it is orthogonal to their body, the way I read it?

Also I have been known to allow Jokers of species that don't normally gendervariance (e.g. shren Joker). That said, I don't mean to categorically rule out trans fairies, and nonbinary ones of certain sorts especially seem #aesthetic.

In what ways is plain sign weird? It seems like it wouldn’t be any weirder than plain writing (both involve gestures instead of speech, which presumably can’t superimpose the same way), although I guess most fairies might just have more practice with the latter?

Plain sign involves broader gestures than plain writing.

From what I've learned about Visitor fairy aesthetics, I expect gender distribution to vary by kind. I expect that some kinds are all straightforwardly men, and some kinds are all straightforwardly women, and some kinds have both; and some kinds have a whole continuum between, and some kinds have two genders but they're all really femme. I expect that some breeder kinds have men and women who reproduce by dancing with each other, and some breeder kinds have all women except maybe a man every thousand years, and some breeder kinds need three genders to reproduce.

Gender distribution does vary by kind. Leaflets are all female, for instance.

Would aging or de-aging a mortal also be edge cases where the master’s opinion counts for the definition of harm?

Hmmm, probably!