Wookaroo on 20 April 2009
Alicia and Welkin, however if we're going supporting characters:
Largo, Rosie, Marina, Vyse, Aika, Zaka
My favorite out of that list is Vyse for sure. :) I used him in just about every mission.
Edit: Hans is pretty awesome too. Can't forget Hans! 
Person 1: Does Valkyria Chronicles have trophies?
Person 2: No.
Person 1: Forget it. I'm not buying it.
Person 2: Wait! It's amazing! Unique, charming, drop dead gorgeous... Hello?
