Sukuna doesn't have the time nor patience for these brats. Besides, he's already holding back enough in his standards for these idiots he has to call students, He watches as his students raise off the ground before falling again as he attempt to teach them to fight on training grounds. He clicks his tongue in annoyance

"Get up. It's a mere bruise. You're better than this, dont be disappointing, no breaks get up"

He's the King of Curses, not some babysitter. He needed something more, not just inexperienced brats trying to stand up & hit him in utter incompetence. If someone says he's heartless, he'll simply say he's training sorcerers to be able to fight curses, not dance & sing along with them with the power of friendship & magic

"Gojo is too soft on you, brats tch. Get up & fight, im here to teach future sorcerers, not some weaklings"

He sighed, almost disappointed, mostly bored. If it weren't for the higher-ups forcing him to be a teacher here, he wouldn't have done it personally