Simply put, this is a character who has been Made a Slave for the sexual desires of others. This happens especially often in Dystopia, The Empire, and the darker versions of Fetish-Fuel Future, either to show how much the world sucks, or, well, just because. In the former kind, the Sex Slave is rarely a protagonist. At best, she's a Damsel in Distress for the hero to rescue. At worst she only [...] [tvtropes.org]