In the 1980s series, She-Ra was intended to extend the appeal of the "Masters of the Universe" setting by being of interest to young girls in the same way that He-Man appealed to young boys. Filmation writers Larry DiTillio and J. Michael Straczynski created the backstory for the property. She-Ra was introduced in the movie "The Secret of the Sword" as Force Captain Adora of the ruling Etheria, but turned out to be Princess Adora, the long-lost twin sister of He-Man, Prince Adam.