In addition to a race, you will also choose a class during character creation. Like race, different classes gives different bonuses to different stats, but they also determine which of the six origin stories you play through at the start of the game.
Here are brief descriptions:
Warrior
Warriors are powerful fighters, focusing on melee and ranged weapons to deal with their foes.
They can withstand and deliver a great deal of punishment, and have a strong understanding of tactics and strategy.
Mage
As dangerous as it is potent, magic is a curse for those lacking the will to wield it. Malevolent spirits that wish to enter the world of the living are drawn to mages like beacons, putting the mage and everyone nearby in constant danger.
Because of this, mages lead lives of isolation, locked away from the world they threaten.
Rogue
Rogues are skilled adventurers who come from all walks of life. All rogues possess some skill in picking locks and spotting traps, making them valuable assets to any party.
Tactically, they are not ideal front-line fighters, but if rogues can circle around behind their target, they can backstab to devastating effect.