Day man, Champion of the Sun...Period.
Created by Charlie Kelly of the infamous "It's Always Sunny in Philadelphia". The story is that Charlie was huffing spraypaint in the dark playing with his keyboard. His friend Dennis came in and opened the window. This sparked a chemical reaction in Charlies brain. He brought up a beat on the keyboard and Day Man was born.
Later on the roots of Day Man were explored in Charlie Kelly's musical "The Night Man Cometh". It is discovered that the Day Man was a boy who's hole was sold by a troll to the Night Man who concurrently sexes the boy. Later on the boy becomes the troll's slave and then turns into Day Man. He kills the troll and then after an epic fight with the Night Man also kills the Night Man.