The pronoun “thon/thon’s” (short of “the one/the one’s”) is a third person gender-neutral pronoun that exists because a bunch of lawyers had a bit of a hiccup once about a woman called with a masculine pronoun.

I think it’s also a good candidate for the obviative or a “fourth person” pronoun, since “the one” could refer to a subject/object that’s less salient than the proximate.