Friends works. :)

I was thinking that the characters could live in a major magical city with lots of diversity (to allow for almost any other species we want to show up, like elves or goblins if we wanted to), but the main characters could visit each other. Maybe one would be richer than the other (again, a bit like Iron Man/Stark and Hawkeye/Barton), but they are still friends. 

Also, they are supposed to be high school age?