Aatma means Fairy so, Eo is a demon fairy

Levion aka Eo is my new boy that I couldn't resist and had to grab from  ~RIZONIK~

So the lore behind him is that the jewel above his head is called the jewel of life. It has the ability to restore dying things, heal the planet and cure aliments. Once named the soul of life the jewel sat in a temple, pumping limitless amounts of life energy to heal the world from natural disaster. Eons passed in the temple was to ruins and disaster rought the lands. Known as Levion at the time, a voice rang through the twilight forest and at once he heeded its call. A mischievous demon whom found enjoyment in pranks and general mishap went to the ruined temple hidden by the sands of time. Broken columns laid to waste, there the jewel under rubble. As the daemon aatma got close the jewel hummed and vibrated. Once freed the jewel had chosen, howevering over the aatma's head, a blinding green light exploded outward and when it all cleared, Eo, Guardian of the Jewel of Life was born.

Not just a patron of the Twlight Forest but now of guardian of nature and life itself, it is his duty as a daemon aatma to protect his forest and heal the disaster of the world.