User blog comment:CoolJazzman/Stern Ritter count/@comment-6800355-20130628000828/@comment-11051098-20130629211702

Kubo might have kept it secret to hold us on the cliff. So far, according to the list on the Vandenreich main page, we have 17 Stern Ritters revealed, including Shaz Domino and the unnamed guy Kyôraku fought. I guess the rest will be revealed in the next chapters.

If the theory of 1 Stern Ritter per letter in the alphabet is correct, there's 10 Stern Ritters remaining, including the "geh geh geh" staff guy, which I suppose is a Stern Ritter too.