“Favorite character of non-binary or player-defined gender”
This is where gender-selectable RPG protagonists go, and Robin from Fire Emblem Awakening would hardly be a bad choice, but I’ve got someone else in mind. And no, it’s not Subaru either.
In this case, I’m going with a classic character who’s been in a lot of games. Originally a sidekick, but also the star of their own series. Sometimes called “he” but lays eggs. Also sometimes paired up with an even earlier character who was the first transsexual character in video game history.