Successfully complete one of the following task to unlock the corresponding Create-A-Soul character class:

Assassin: Reach level 30 with a Ninja in Chronicles Of The Sword mode or play 410 battles.
Gladiator: Reach level 30 with a Barbarian in Chronicles Of The Sword mode or play 410 battles.
Knight: Reach level 50 with a Gladiator in Chronicles Of The Sword mode or play 610 battles.
Pirate: Reach level 30 with a Pirate in Chronicles Of The Sword mode or play 410 battles.
Sage: Reach level 30 with a Saint in Chronicles Of The Sword mode or play 410 battles.
Samurai: Reach level 50 with a Assassin in Chronicles Of The Sword mode or play 610 battles.
Swordmaster: Get a level up when all other jobs are above level 50 in Chronicles Of The Sword mode or play 610 battles.