Tribes

Tribes might be the wrong word to explain the inhabitance of Pandora, there are many tribes and many villages of which they live in.
Its more down to what has happened to the humans, and what they have become. I guess Race would be the best way of describing each of these groups, though all started as human, they have been twisted and turned by powers uncontrollable by any mortal into something unnatural.

Humans:
They are numerous and survive though the monsters like to feed on them and the other groups would like to be the dominant race upon the island. Their Guardian has taught them much in the way of weapons armor and fire, but will not share the secrets of magic with them and has outlawed its used.

Dwarves:
More a slave race than a slaver race, dwelling in the mountains mining for precious metals and ores for their own Guardian, until she is sated they will carry on. They have many underlings and minions to do their bidding, though with such harsh working conditions and no protection the dust kicked up is starting to send them mad.

Elves:
Vain. Would sum up the Elves in one word. Care for nothing but themselves, and this will be the down fall of the Elevon people. They stay to the forests and glades mainly, only venturing out if they think some one is threatening their way of life.

Trolls:
Monstrous cave dwellers from the frozen regions, gifted with thick skin almost like stone from their guardian, simply left to defend while strength returns to finish the war started among the stars.

Vampires:
Hiding in the dark, protected from the Wares, one small tribe was befriended by a Guardian that gave them a great gift, which turned into a great curse. An made them killers of all.

Weres:
One tribe upset a Guardian, who then turned on them, which started a chain of events with two other tribes of man. The ending result was a destroyed and dieing Guardian and Three different types of Were. One a Wolf, One a Cat, and the last a Rodent.