Enneas Saga have 9 Races :
There are currently 4 Role in Enneas Saga, Tanker, Melee, Ranged, and Healer. Melee and Ranged are all DPS classes, Tanker is a Protective classes, and Healer is a Suportive classes.
You could create a basic party with 3 DPS, 1 Tanker and 1 Priest. but depending on situation you will need to change your party strategy.