Just as the main bosses of the game represent the Seven Deadly Sins, major locations of the game have a symbolic or ironic connection with the demon that is plaguing them.

Diligence and Industen (Industrious) were once the hardest of workers, but then became so weak that they even lost the will to live.

The queen of Devote, instead of devoting herself to others, was so incredibly jealous of all other beautiful things that she sank her kingdom under the sea.

Temponia and Modero (Temperance and Moderation) once had extravagant amounts of food, but then starved.

The former friendly nations of Favorian and Justania (Favor and Justice) were engaged in a bloody war brought on by the demon Fury. The demon filled the Justanian king's heart with wrath.

The king of Lovaous (Love) was plagued by the demon Deception in his dreams, which filled his mind with thoughts of lust.

The king of Stormrook, overcome by greed, takes all of his citizens' money and sends them to a prison called Gratis, which means "for free", a play on words both for greed and for a prison.

Humbleton (Humble), a highly civilized, technologically advanced nation with no faith in the master, enacted a plan to build a tower (Tower of Souls/Babel) to reach the heavens and become Masters themselves.
Contributed by TomGuycott