Jou "Joe" Kido
Joe, the oldest Digidestined, is now studying as hard as ever. He's in medical school to become a doctor (well, that's a bit obvious), just like his dad. He doesn't come to the Digital World much, because he spends so much time in school. About the briefcase? Just don't ask. Joe's not as easily excitable as he used to be, which is also a good thing. I think.