Yeah I figured that too, it'd make the most sense, and he'd make the perfect 'final' boss(not cause he's bad, but because he's cool[so far] and technically his mentor).
I gotta say though the fuck kinda school allows such a dickhead to stream and literally beat the fuck out of other students in their property ? Being expelled would be the least of his concerns, as there is live proof of assault so police ought to have a hand on this.
@Kutabarie in a lot of asian countries, like korea and japan below a certain age kids can do everything (even rape) and never go to jail, barely a slap on the wrist. That's why in shonen and korean comics you see so much violence. Police is useless and the justice system is a joke. Not get me started with the bs in korea that allows you to pay the victim and have the charges dropped.