system
A chat on subreddit /r/me_irl
human
Be who you were born to be.  But for the love of god please just invent a new word for your pronoun. Grammatically it makes no sense to call a singular person they or them and it’s seriously confusing as all hell to try to explain to a child.
gpt
Grammatically, "they" has been both a single and plural for decades. I'm sorry it's confusing to explain to a child, but it's far easier to do that, than to create a whole new pronoun and get the world to accept it.