Board Thread:General Discussion/@comment-24251492-20131204155955/@comment-26420452-20131205174404

It's never been mentioned if there's any number limit to the Royal Guard, but it's most likely there isn't. That means that the ones who really changed the course of history are just five (unless Shinigami die of old age. I've got no clue. Do they?)

So, if the Soul King wants Urahara to be in the Royal Guard, so it'll be, but we don't know at all how he/it thinks.

@Stefan Colonel Sniper is the best choice, but I wouldn't exclude the possibility of either Haschwalth or Nakk le Vaar.