User blog comment:Silver-Haired Seireitou/Sake Time with Sei - The Five Guards/@comment-1493741-20141008175458

Oh... so that's why my hands smell dirty. Goddamnit Sei, clean up back there man.

They've already been hinted at largely, at least from my perspective. Kirinji's thing is the crazy healing water, which he uses in a fight. Senjumaru makes the Oken clothing, wields cloth, seams like no-one's business in combat. Oetsu has hundreds of Asauchi at his beck and call and those five Zanpakutou smiths, as such I'd see it that his fight would involve using smithing techniques and tons of loosely dressed women-sword-folk. Hyosube, the guy that named everything, likely has some wizardry going on which I think would turn out to be word-based manifestations (He says tower, a skyscraper shows up and so on).