Humans: The humans of CloudStock are adapted to life in the skies. As a result of their war with the mastigs, they have formed the CloudStock kingdom, a united force fighting for survival.

Mastigs: Large and covered in fur, the mastigs are a strange sight in this world of open skies. Why are they here? Where do they come from? Why do they wage war? Their might is unquestioned, but so much about them is unknown to the people of CloudStock.

Harpies: A winged race of humanoids scattered throughout the skies. Their settlements are far removed from humanity, but are no doubt advanced, for their traders travel long distances and tell tales of peaceful skies, never in conflict with the mastigs.