Perhaps Samurai, as isn't the main bad dude in 4.0 have Samurai like armour or something?
So Red Mage, dancer (Possibly) and Sam (possibly)
Also i do not know why some of you are getting so worked up. People are not saying 100% that it is Dancer, same thing goes that you guys saying 100% it is not... both sides are neither wrong or right atm.
This is most likely what SE wanted all along, speculation. lol
The female may be Monk or may be dancer, or can be Monk with dance likes moves just to hint around that dancer is coming.