It seems to me that finding #agender representation in popculture and media is almost impossible. Unless you are okay with #genderless angels or robots/androids or other fantasy or science fiction creatures.
I have written an agender angel character myself who is on the ace spectrum.
The book got rejected by a small publisher because they don't publish this kind of queerness. So instead I selfpublished the novel.
I also have written a novella with an agender human person.
1/2
