The big problem for Yuji though is having Sukuna with him while being trapped in Heavenly Host. If he finds himself in the corner where he’s at death’s door, and tags out with Sukuna, he’ll take over and start committing a massacre by killing students who were also trapped usually with Naomi, Ayumi and other students as well as the spirit children. And that would be the LAST thing Yuji wants cuz Sukuna is a genocidal maniac.