Walking outside of his clans grounds in a long time, he finally had somewhere else to reside, even if it wasn't from his own free will.

It was this moment Zen'in was long waiting for, even if something deep down didn't want him to leave the place he knew so well even if it's for a couple of years despite it being so crappy.

Zen'in wasn't too fond of his new mentor, he saw Gojo as childish and immature and didn't bother to look past that exterior so they didn't get along well at all, their interactions ended at the introduction of missions.