It is the responsibility of the Windmill Kingdom to create wind for the planet. Besides wind, the Kingdom also takes care of other weather related issues, such as creating and managing clouds. The big windmill in the middle of the city is responsible for most of the wind production/
The twins, Auler and Sophie, live here with their parents.
Sophie: Princess of Windmill Kingdom and Auler's younger twin sister.
Auler: Prince of Windmill Kingdom and Sophie's older twin brother.