It is impossible, to play all characters at the same time. You can play them one after another, but not at the same time.
Combat is turn-based anyway, isn't it? No one here has a mechanical problem playing multiple characters.
I guess, you can hardcore role play them, if you really want to compete to each other.
I do. It sounded awesome in the Kickstarter pitch.
But honestly I'm not even sure why there even should be competitive play.
Same reason an author writes a book with both a hero and a villain. Because it's interesting.
(It's even
more interesting when the author doesn't know which one is going to win.)
