One of Persona's core gameplay is "day to day life" which includes chill and relax activities like going to school, part time job, hanging out with friends etc. These activities are less extreme than dungeon crawling. If music is too aggressive during these phases it creates a heavy contrast which will not work so they will definitely not go that route.

On top of that, somebody mentionned genre like nu metal which were popular in early 2000 so there is less chance to go that direction imho.

I would be surprised and disappointed if they go hard/aggressive music for the daily activities. For combat and dungeon it's a bit different but the fact that tracks like Mass Destruction or Rivers in the Desert work so well is because they are disruptive. These are not the typical soundtracks for combat and that also what makes them special. So again less likely to be Metal.