I'd prefer to keep it for approved characters only. That way, if someone wants to app a new character, they can look through that list and see who is already in play as far as parents and powers. Easier to make sure there aren't duplicates.

As far as the character, he sounds okay. BUT I'm seriously wondering why he'd choose a school. He doesn't seem like the type who thinks he has to learn anything from anyone else. Plus, I'm pretty sure the Academy would have decent security.