It’s pretty much impossible to have an nb choice if you’re not nb. It ends up weird and fake… it’s probably why no male actor ever plays a woman and no adult ever plays a child (except in a comedy) - it’s impossible. @Laguz is non-binary, and might be of some help, but personally I think it’s impossible - if it was possible there would be movies like that already.
It’s probably best to just avoid gendered pronouns, and not be writing about what you don’t know, because people who do know will know it’s all fake and wrong. For instance
Lonan the super-evolved trans-human can handle anyone
comes across (to me) as being very, very sarcastic, as if you’re implying transsexuality is some sort of super-power. It seems really obvious that you didn’t actually want to put in the nb choice in the beginning, but you felt you had to. Literally no one says “good morning, young person” - you put that in because you felt you had to - in other words you’re being patronizing, and everyone knows that but they’re too nice to tell you. You could have just had the character say “Good morning” and left it at that. That last line could have been
You could have just had him say "Good morning" and left it at that.
But that locks a gender. Or I could have written
You could have just had them say "Good morning" and left it at that.
But that’s going to be ambiguous - who is “them” ? so I went with
You could have just had the character say "Good morning" and left it at that.
Which is gender neutral and also specific.
I had the exact same problem with Outcast - this overly condescending, patronizing, let’s-bend-the story-to-fit-in-the-nb-people thing.
I think you know as well as I do that they are them, and we are us, and we’ll never be them and they’ll never be us, so maybe we should just be us and try not to be them (because we never will.) Just like the male/female thing, how does that change the story other than the name? it doesn’t, because you can’t, because you’re not female or nb and you won’t ever know. So why’s that option there? what purpose does it serve, other than to be a sop?
You can’t write a story from a female POV because you are not female. Similarly you can’t write a story from a nb point of view because you are not nb. There seems to be no point in requiring a person’s gender when it will do absolutely nothing for the story (and it won’t because you can’t write a story from an alternate gender’s viewpoint simply because you aren’t that gender.)
Baldur’s Gate had someone like that - https://baldursgate.fandom.com/wiki/Nalia_de’Arnise
I can't stand seeing all these taverns around the city. They exist simply to drain the poorer classes of their money and throw them into such a stupor that they can't even realize their oppression.