The idea of a traitor has been floated around since Zou. Since then, Kanjuro, Raizo, Shinobu, Carrot, Denjiro, Toki and Hyori and Ashura Doji have been floated as potential traitors and even that there was no traitor. Zou was 4- 5 years ago. Congrats if you "figured out" Kanjuro was the traitor...