I can't beleive I have been here for this long and haven't provided a proper picture of Denki Yet.
Well, this picture is special though.
It is also the first time I have Drawn Narikura.
Essentially Denki is a user of Divine Radiance (Light) and when he gained the power the darkness in him fled till it was caught and made into a physical body by a truly evil being.
So Nari and Denki are constantly fighting one another for power, and because they are connected in personal energy, If either dies the other dies as well.
Denki's character is still a work in progress, and there are things I haven't mentioned, mostly the religious aspects, but still that is the general idea.