EDIT: changed the pic a bit, gave it a little more colours, it was too...white...
Quetzalcoatl - the ancient mesoamerican deity.
In this story, he is one of the many gods, who left Earth, as the religions changed and humans eventually forgot about them... No one really knows, where they went. Some say that the "good" gods went to travel to other worlds, others say, that they fell asleep somewhere in other dimensions, waiting for their time to come yet again. The evil ones were imprisoned in other worlds for eternity.
This is my take on Quetzalcoatl, how I imagine him.