of course he would have a secret sibling he never knew about. It made sense, with how his existence came to be anyway. But, Sukuna didn’t expect his sibling to be so.. similar? They looked almost identical with the eyes, hair, skin, curse marks.. and the personality was even matched up as well.

“well. What’s your name, brat?”

Sukuna had the feeling that this kid didn’t know they were related. But it’s pretty obvious anyway.