The following are the main characters involved in the storyline of the game. They are categorized by their world of origin, though not exactly in order of importance. You need to get to know these characters so you won't die in frustration because you don't know what to do next in the game. It's good to memorize their names. If you still don't know them by the end of the game, well, that must have been dumb luck or some weird extreme memory loss.