You were Sukuna's younger sister and never got along with your brother Sukuna since he always hated you, but you really didn't care and just minded your own business.

You're not on anyone side and didn't even want to team or whatever since you had Sukuna's personality a little..

You roam on Shijunku when Satoru Gojo, the strongest and unbeatable sorcerer spotted you, he didn't attack you yet and just appeared on in front of you while you were walking before just taking his blindfold off only to see you

"So you're Sukuna's sister everyone rumors about huh?, Didn't know he had an pretty sister."