Rainbow's parents met during the Summer of Love. He was conceived and born in the back of a VW Bus. When he was one, they attended Woodstock (Rainbow was particularly impressed by Grace Slick's awesome voice).
As the years went on, his parents brought up their love child to be an environmentally conscious liberal embodying peace in the world. In the fullness of time, he became an environmentally conscious reactionary who believes in peace through superior firepower. Today, he fixes servers for a living but would prefer to be a supervillain plotting world domination on a remote volcanic island.
Becoming a dictator is a tough career change to pull off, so he channels his evil genius into creative writing. Mostly it is science fiction and fantasy parodies, and he aims for the golden mean of cheesiness which makes a story so bad that it's good.