Yfus' campaign in general. Unlike the rest of Six Stars (the ones we see in-game, anyway), he was never able to recover from Havan devastating the world, and the members of Six Stars going their separate ways only made his depression worse. By the time his campaign begins, he's become a bitter, jaded shell of the Hot-BloodedNice Guy he was in The Reconstruction. Even after the Tatzylvurm tries to give him advice on how to improve his life and reforge the friendships he so desires, the ending heavily implies that the Tatzylvurm's words actually made Yfus's depression worse and only served to hasten his downward spiral.
