Thread:ShonenChicoBoy/@comment-4666155-20180521062019/@comment-2089817-20180521214953

When did Yamamoto steal the Bankai back? He never took in that Hollowfication thing Urahara and Mayuri created. He died by Yhwach's hand after his Bankai was stolen. Hell, Yhwach even taunted him with using it on him.

It is a little random, but not wholly impossible. It doesn't even have to be a soldat, could've been one of the Sternritter; any of them, it doesn't really matter unless they come up in the FC story specifically.