Ravana is the homeworld of the Rakshasa.
Rakshasa come from another planet, Ravana, which has a dark sun that beats down with ultraviolet rays but little visible light, leaving the world dark and barren, and pivoting between extremes: blisteringly hot in the day and freezing cold at night.
On their home world, Rakshasa are shapeshifters, able to take on dozens of forms at will. They use different forms for different situations and times of day. This ability, combined with their incredible willpower, allowed them to survive on Ravana when most other life died.
Their cities on Ravana are vast structures that tower out of the desert, usually encircling a rare natural source of water.
Rakshasa on their homeworld are more advanced than any race here on Alharth. They have mastered planar travel and many now live on other worlds. They are ruthless, merciless, and can adapt to any environment. However, they are not particularly greedy, and so they don't spread to worlds that they don't need. Thus in terms of planar politics, they are considered a mid-ranged demonic threat (see Demons).
— Developer Blog October 18, 2014