The God of Skypiea, an island in the clouds above the Grand Line, Eneru takes his title literally, forcing his followers to worship and serve him. Eating the Rumble Rumble Fruit gave him the ability to manipulate, generate, and transform into electricity. Additionally, he is also able to use Mantra which allows him to predict anyone's movement and to sense anyone's position within a certain range.
Beautiful cosplay! Stellatvia, the photographer contributed this some time ago, but it got lost in my spam filter! I'm so sorry about that, Stellatvia!
Also! This was taken in Germany's Connichi either in 2006
or 2009. I hope someone can identify this cosplayer so I can give proper credit!
EDIT: Thanks to anon for letting me know this is raubkruemel from Germany!