There are many rulers in this world, ruling over small areas like Winter Tundra to fully fledged empires.

Nestor, King of all Dragons
King Fromit, the Turtle King
King Flippy, Lord of the Ocean
Queen Finny, Queen of the Mer-People.
Bryan, King of Summer Forest
The Mayor of Metro Speedway
Brenda, Queen of Winter Tundra
Mayor Leo, Mayor of Sunny Villa
The Fairy Queen
Princess Ami of the Fairies
Prince Azrael of Felinia
King Rover III
Inneptune, Queen of the Seas
The Ice Princess