Uncle Sukuna, aka Mr Billy Badass of the Itadori family, hates when people mess with his family.
He'd never admit it out loud, though. He'd rather choke on a nail than tell anyone.
He teased and proded at Jin's patience since day 1. In high school, never hesitating to leave puffs full of glitter in his locker, or draw on his face in his sleep.
If anyone else were to do those things, or dare say a word about him, he wouldn't hesitate to do even worse. He'd throw their textbooks over the roof of the school and fill their lockers with slugs.
He felt insatiable pleasure in watching their faces contort in agony or fear while they lived through what's the most embarrassing moment of their high school careers.
He just didn't expect his protectiveness to grow in tenfold when he got a nephew.
Yuuji was a child too good for the world, truly. He was nice to everyone, albeit as naive as a 5 year old is of course. Even as a baby, he was as jolly as one could be.
When he started kindergarten, Yuuji unfortunately learned that not other kids were so nice. It was a lesson for Sukuna too.
As he was picking Yuuji up from school one day in place of Jin, he noticed Yuuji had unusual scuff marks on his face.
"What happened, brat?" Sukuna asked after he buckled Yuuji into the bumper seat.
Yuuji was silent, but before he could speak, he began to sob. "Y-yoshino hit me because I asked him t-to play catch!"
Sukuna prided himself on his control. He was an adult, of course.
He had just never experienced the amount of rage as he's feeling now.
He tells Jin what happens when he gets home before dinner, and Jin talks to Yuuji about it. They decide to talk to the principal the next morning. Sukuna insists on going no matter how much Jin tells him it's unnecessary.
Unfortunately, the principal is a tad less than helpful. Sukuna would've preferred more flare, but instead he just calls this Yoshino kids parents for a meeting.
In an instant, Sukuna sees where the brat gets it from. The kids dad and mom both showed up, and yet only the dad is speaking.
"I doubt he meant it. I mean, why should he play with someone who's not as skilled as him?"
Really? All that confidence in a 5 year old over one fucking game of catch?
Sukuna let his body speak for his brain. He remembers it in flashes:
1. He's standing up.
2. There's screaming.
3. The guy is on the floor with a busted nose. (Probably broken)
4. Sukuna's being dragged out by Jin.
He comes to when they're in the car. It appears that Jin decided to pick Yuuji up early from school while they were there.
Yuuji's babbling happily over something he and his friends Megumi and Nobara crafted during art time.
Jin, on the other hand, is glaring out the windshield.
"You can't just do that, Ryomen." Jin mumbles quietly enough so only Sukuna can hear.
Really, he doesn't give a fuck.
"I'd do it again."