It'd be funny as hell if it's Kobeni. She didn't wanna reveal her devil and she has miraculously avoided certain death at multiple points. Could very well end up being her. But there's also gotta be a catch cuz all horsemen so far have ringed eyes and Kobeni doesn't. I wouldn't rule out the possibility of her being the death devil yet though. However, I think it will prolly be a new character I guess, like Yoru and Fami.