Everything came clear to me when I finally completed the offline campaign (Firiona Vie’s campaign, that is). While at first I believed that the game saves the character individually, it is in fact the other way around. Your character is stored on the memory card, saving its progress either in the offline campaign or online game. Just a few hours ago I defeated Cazic-Thule and saw that my saved game said GAME COMPLETED. I couldn’t re-enter my offline game so I headed online, chose a game that allowed my Vah Shir Berserker (who is saved within my Game Completed file), and asked a simple question: “Can my offline character save its experience gained online?” I was answered with an annoyed “Yes you damn noobie!”