How about this. We're space raiders, working together, we raid planets to capture people and sell them. It doesn't matter if they are human or alien, we always get a good price on underground space stations trading with local gangs. My character would be a young human girl, quite attractive, and often using her body to attract preys, but turns out to be really dominant towards our captives. You could play either a human or alien, and maybe we decided to keep our latest captive for ourselves, as our playtoy.