They're gender neutral. Like me. Singular they has always been a thing, in English at least. [Rowan adds the second part a little belatedly, remembering that English can't be Jackie's first language.]

Lots of people like us use they/them. There's other pronouns people use as well, ze/zim/zir is the one I hear most often, but they/them works best for me. It's how I feel most comfortable.