Essentially, after the death of Kurama, following the usage of Baryon Mode, he somehow respawned inside of Himawari, making her a Jinchuriki, strange as that may be. Boruto Uzumaki has grown ...

Baryon Mode could make Himawari the world's last ... Himawari will not be fighting for control with Kurama, so using the Bijuu’s power will not be as dangerous or restrictive.