Here are the branches that you can choose from the Accretia class tree:

Warrior: (Melee)
Level 30: Destroyer and Gladius.
Level 40: Punisher, Assaulter, and Mercenary.

Ranger: (Range)
Level 30: Gunner and Scout.
Level 40: Striker, Dementer, and Phantom Shadow.

Specialist: (Special)
Level 30: Engineer
Level 40: Scientist and Battle Lancer.

Check www.rfo.askterix.com for more details about the listed branches above.