Talk:Ken Kaneki/@comment-26316510-20150425160036/@comment-24494906-20150426011541

I'm not aware of any numbers before the Aogiri arc. The first one I know of is Juuzou's introduction (and that one is super-obvious). The second one is the 12 in chapter 63 on Kaneki's hands.

Yes, there seems to be one other character who was temporarily associated with 12. Juuzou lost one of his hair pins during the fight against Owl - XIII (13) became XII (12).