There are three unused character classes within the code of the game. There is the unfinished 'Giant' class, and the finished 'Lycanthrope' and 'Werewolf' classes. It is unknown why these were omitted from the game.
It is possible to have one of the main characters, Diomedes, leave your party early in the game based on how you answer in game questions. He will then replace a boss later in the game.