Dad's not that smart. I posted on the Reddit, too, and it seems the common thought is that someone, somehow, joined his party while he was making it, and when the game actually started, the other person left.
My father has been able to control this second NPC from the beginning, however, he cannot talk to her.
Ahh right. Then I guess you have "Online game visibility" from options set as "Anybody". Might want to change that, unless you enjoy these surprise visitors.
