I made album covers for my OCs because I felt like it.

Corvan would definitely make alternative grunge/rock music like Arctic Monkeys or Green Day.

Terrance would probably go the alternative pop route that's more mainstream like Panic! at the Disco or Twenty One Pilots.

Iisan is a total metal head. Very heavy Japanese rock and metal like Ado or Korn.

Emma is definitely more soft pop like Mitski, but maybe a little like Marina (and the diamonds).

Bradley is just 90s grunge like Nirvana or Green Day. He's my only music oriented OC in actuality lol.

Lauren is so mainstream pop but it'll always be at least a decade out of style. She'd have nostalgic sounding songs that give early 2010s vibe or even just the 2000s.

Jason would probably pursue rap and skatercore type music like Blackway or DJ Khalil. He's definitely not very good at it though.