Best CP Origin Stories

Rainbow Factory

In the original story, a group of young Pegasi find themselves sent to a death-camp known as the Factory, designed to create rainbows via mutilating "failed" Pegasus and using the remains as a means to form the rainbow colors.

The Rainbow Factory is said to be a part of Cloudsdale's darker history that is kept hidden from most in Equestria but, once chosen, a "failure" is destined to die while having no means of escape.

For much of the story there is no mention of Rainbow Dash herself but she is revealed near the end as the authority behind the Factory and in contrast to her heroic nature in the show she is seen as a sadistic, genocidal Social Darwinist who wants nothing more than to continue the Factory's bloody "cleansing" of Cloudsdale, seeing the mass-murder of "failures" as a part of keeping order and ensuring things stay as they should.

Scootaloo is believed to have been apart of said group and attempted to escape the factory with her newly acquired friends. However, she was unsuccessful as Rainbow Dash goes out of her way to ensure that Scootaloo and the rest of the failures are properly slaughtered.

Pegasus Device:

In the sequel, Rainbow Dash is struggling to maintain the Factory's order and has begun to lash out at her employees, although at times she seems to feel genuine remorse for her actions.

At the end of the story, her co-worker Dr. Atmosphere kicks her firmly with her hind legs, knocking her out cold, however, she isn't dead, as Hide states that he would "catch hell for it later". Rainbow Dash returns again in the same room, prancing around, as her technology had been destroyed, knowing full well that she would have to reveal her secrets.

Considering the fact that Rainbow Dash now knows what she's done is wrong, it's likely that she will be completely honest to everyone and will not have to face imprisonment or execution, but will just have to deal with the guilt of her friends knowing the horrendous crimes she committed. She moves closer to the machine before remembering the first time it arrived, and how it will forever be a part of her, even though she is still rather confused.