Currently, there are 5 classes in Fiesta: Archers, Fighters, Mages, Clerics and Tricksters. Archers are a ranged class that use bows and crossbows. Fighters are a close-ranged class that use one or two-handed swords or axes to deal damage. A Fighter can equip a one-handed sword and a shield, or wield an axe or two-handed sword. Mages are a ranged class that use staffs and wands. Clerics are a close-ranged class that use maces and hammers. Clerics are used to heal and resurrect other players because they are the only class that have that ability. Tricksters are close ranged class that uses Claws or Daggers to inflict damage.

The classes have three ranks offering a specific path to follow. These promotions are required for a character to advance in both skills and the equipment they are allowed to use.