Lore: Originally, Harpies served Aviana. Then Aviana died and they fell under dark influences, which is why Harpies are bad now. But Aviana has been resurrected since Cataclysm. She should have started going around and putting her children back in the right path already!
Classes: Warrior, Rogue, Druid, Hunter, Priest, Shaman and Warlock.
Faction: I don’t care. Maybe Alliance because Night Elves have a group of Druids whose job is to worship Aviana? But I really don’t care.
Closing Argument: Playable Harpies would make me Harpy
I put this in because there are basically two kinds of Harpies, the fighters and the witches. The fighters I considered to be Warriors, Rogues and Hunters, while the witches I considered to be Warlocks and Shamans, which are the Classes that the game has historically called “Witches” before.
I also added Druid because Aviana and Druids of the Talon and stuff. Priest for the same reason, as I think any Race defined by their deity should have Priests.