Basic summary of the revealed classes found from some source.
Monk -
Skilled in unarmed combat and use ki to heal allies
Phalanx -
Skilled with spears and defense
Shinobi -
Skilled in hiding and aiding the party with exploration skills
Pirates -
Skilled with swords and guns. Loves to attack with friends
Princess/Prince -
Raises morale with their noble blood
Other classes include Farmer, Sniper, Oni, Berserker and Astronomer
(heh, Princess...influenced from 7th Dragon much?)
Actually the Princess class first appeared in the Ogre Battle games! Though its likely the inspiration for the class was from 7th Dragon.
There's a local multi-player element as well...
Interesting.
I assume its been added in response to Dragon Quest IX and Hikari no 4 Senshi.