User blog comment:RoyalGuard-Elite/Kenpachi Shikai/@comment-9365367-20130914170247/@comment-11051098-20130914224006

Every Zanpakutô has a different tsuba. Maybe there's other differences, but at least the tsuba. Maybe Kenpachi's Zanpakutô just developed that particular kind of tsuba, and the wrapping around the hilt and sheath.

But if he have stated that his Zanpakutô is in a constant Shikai-state, then it is so. But is it even possible to get a Shikai form in the first place, without knowing the name of the Zanpakutô? The owner has to release the Shikai form, after all.