Board Thread:Wiki Discussions/@comment-27311086-20160803164311/@comment-26653902-20160806195244

EatPlayNoSleep wrote: Also, when is comes to the Dual Kagune part, there are two that come to mind that haven't been confirmed to my knowledge. Nutcracker and Shikorae's parents weren't ever revealed nor do I remember it being implied they inherited it from their parents. Does it ever explicitly state that it can only be inhereted from parents?

It was only ever said to be inherited, and there's nothing to suggest either of them had new ones implanted at the moment (nor is it plausible with how risky transplantation is).