> I feel as though Hazel would start/join a sort of musical club. Maybe an in school band or just a basic music club, anything could work with her.

Musical club sounds good as well as band. I'll add that in the next announcements post!

> Also, would it be okay for me to add a NPC? As a roommate for Lydia? Do I need to fill out a character sheet for that?

Yeah that's fine. If you would like you can add some basic info to your character post about the roommate.