Ghosts

Ghosts are a lower class of evil beings, specifically the third class, though there are many of them. It is not known if they used to be humans or if they are their own kind of monster.

Ghosts are what the player will see in the over-world maps and in dungeons, when enemies are around and able to attack the player. The first ghost encountered in battle is also the first boss, found in the Church's Basement.

Abilities
Ghosts in Okage Shadow King are shown to have multiple abilities.

Curse of Pig Latin
Ghosts have proven to be able to curse their victims to only be able to speak Pig Latin. Though this doesn't have any actual threat to their victims, victims like Annie have overreacted and felt as though their lives are ruined.