Kijikaiaku are a species of nature spirits that resemble a combination of a fox, lion, and dragon. Invisible to the naked eye, they were created by Gaia to help save the world from collapsing.
A newer species to Gaia's world, Subtalleons are butterfly hippocampi which were created by Yile to take over Gaia's control on the world and overthrow the Kijikaiaku.
Centaurian are a seperate species unrelated to Gaia or Yile and simply live in an alternate version of Gaia's Realm. They are a mixed race of Centaurs that vary in colors and design.