I've had a headcannon for the longest time that if the brothers were to come up to the human world and try to survive a year in human college, they'd Crack further. Especially if it was in the good ol US of A
They'd have to act like normal people the whole time which means no magic, no demon lash-outs, nothing. They'd have something on them that would surpress their more destructive powers...my thought would be that Solomon probably created something by Diavolo's request, and Lucifer, ever the prideful bitch and fully confident he and his brothers could survive a year in an American College with MC, agreed, without anyone else's consent
I absolutely love the AU I personally created with this base concept, and I wanna write for it. Becaude I can just imagine after an all-nighter Leviathan going to a swimming pool and flopping down face first, falling asleep in the water, and being able to breathe...but of course no human present but MC understands this, so they all think that this man is just....dead 😂
Once again, only their destructive powers would be repressed, as well as their demon forms. So Levi would still be able to breathe underwater (assuming that's something he can actually do...it's my headcannon that he can so shush) and so on. It also wouldn't stop anything like Beel's veracious appetite or Asmodeus' ability to easily charm people. All it would do is make it so none of them can lash out and kill any human beings while on a rampage, and stuff along those lines.
But yeah I think it would be a lot of fun and it would be fun to write for lol so I probably will, unless you guys hate the idea...so let me know what you think, please!