Pronouns

I haven't notice them calling skelly they them but I have noticed them calling Nabi they them

I guess for most people it's because they have a more masculine way of presenting themselves

As for me it's just because skeleton is a male noun in french so I tend to struggle and balance in and out of it

If you go back the succubus friend refers to skelly that way when talking to their childhood friend.

If the gender is unknown you can use 'he'

Gender is unknown but their pronouns are not. They are they/them.

It’s fine to get confused, but presentation and pronouns are different issues. If the author uses he/they then I’d relent but I haven’t seen that