Rain

Rain is the unnamed otherworld entity of Des Dragneel. He comes from the world opposite Beytopia. He originally spawned from Des' darkness and seeked to erase Des frome existance by destroying all the memories of him that lay within everyone who encountered him.

After Rain's defeat at the hands of Snake, he became a seperate entity of Des all together. His world began to degrade and he would have faded away if not for an unknown force that has reborn both he and his world.

Background History
When Des lost the love of his life, his heart plunged into darkness and his powers lost. He was lost in the pits of despair where he tripped a dimensional leak, causing his darkness to take shape and the world opposite beytopia to reveal itself. Memory Skyscraper linked itself to Des and gave his darkness a chance to erase itself from existance.