In TearRing Saga, Dukes are non-playable classes, appear as nobles who can wield Swords in combat and have relatively low levels and stats when encountered in game.
In Berwick Saga, Dukes are an armored class used by ally NPCs, and usually have high stats. They can use Swords and equip Large Shields.
- Codha - The chancellor of Wellt.
- Pavlov - An imperial commander in charge of Sene.
- Kernel - An imperial commander in charge of Selba.
- Ahab - A prince of Salia who launched a coup against his brother, King Dagnell.
- Dolmu - A noble of Reeve who betrayed his country to the Zoa Empire.