D is an alien, who came down to earth in a comet that crashed onto earth. She awoke in a pile of her own pink blood, a painful beginning, crawling out of it, slowly forming painfully as she crawled out. She never remembered who she was or how she got there, but however long it'd been, she arrived fully grown, as if she had a life somewhere else before the strange incident that was her arrival. she would spend her earlier years simply trying to survive in a world that didn't want her. everywhere she looked, people were looking at her as if she were a freak, she wanted nothing more than to be human. She would eventually become obsessed with her own sexual fantasies, and wanted sexual contact with people, thinking of it as her way of being "Human" as well. She also makes a living off of it. She even found the ability to look human. but that doesn't mean she is human

Her greatest desire is to simply be human, someone's gotta teach her to accept herself though.

In An Alternate universe, she would get together with G, another alien from a different universe entirely, who would help D accept herself.

She also has a sister named Dag, who just like Rai And G, shot into different parts of the world.