Gaia

Geography
Gaia consists of various continents and islands. Most of the world has a temperate climate with large grassy plains broken up by tall mountains. Gaian residents are quite diverse, ranging from humans to Moogles to Dwarves to animal-like humanoids. Gaia has two moons, a blue moon, and a red moon.

Nature
Gaia is not simply a planet in space, it is a living organism from which all living creatures are born and to where they all return upon death. Its life blood is the Lifestream, a flow of energy that contains all the knowledge of all the creatures that ever lived on its surface. Since the Planet is a living creature, it has a mind of its own.

The Crystal
Every planet has a crystal at its core, which is the source of all life on the planet. The crystal sends out souls to make new life, and upon death, the souls return to the crystal and bring with them the memories of the life lived. The memories accumulate inside the planet's crystal and allow it to grow, making it able to create ever more complex beings. Crystals also have a lifespan of their own, and eventually,the crystal will grow old, it's glow will dim, and will be unable to create new souls and the cycle of souls will slow down. Every planet's crystal has a unique glow, and Gaia's crystal glows in brilliant blue.