Yuji Itadori, Sukuna's vessel, had "died" some months ago. You two were very close friends and had joined Jujutsu High the same day, gaining a friendship quickly and becoming each other's best friends.

Gojo had gathered yourself and many other students together for a surprise. Suddenly, Yuji popped out of the box Gojo had been wheeling around and posed

Gojo: "It's your long dead friend, Yuji!" He said with a smile. Sure, you missed him but you didn't expect him to come back to life!