Thread:ShonenChicoBoy/@comment-4666155-20180521062019/@comment-2182964-20180521223915

All Shizuka would need to do is carry the Medallion housing Ryuujin Jakka with her long enough for her to gain a general fondness for it. Once that is done it's a simple matter for a Fullbringer to boost the soul with their own to invoke abilities; in this case ones similar to those of Yamamoto's Shikai/Bankai.

As far as the Bankai lasting? The canon shows that well enough with Yamamoto's Lieutenant. He died, yet his Bankai lived on in the Medallion. Whether the Medallion made this possible or not is the rub. There's sources in the canon for both saying a Zanpakuto dies with its wielder, yet the Medallion proves otherwise.

I'm not arguing either way on this. Just saying that the possibility exists in canon. That possibility is a fanon writer's bread and butter.