In the Peacemaker Kurogane manga, the old merchant Yamatoya makes Suzu his sex slave after Suzu's master was killed and he was left all alone starving in the streets. Zev or Xev of Lexx was going to be made one of these, but she broke free before the mental reconditioning was implemented. I came across VIP's, European heads of state, and even a member of a royal family. Word of God has confirmed this. The horrible things that the slavers do to the people they've enslaved hits every one of Castle's Berserk Buttons concerning mistreatment of women and children in general, resulting in one of his most brutal killing sprees.
Wonder Woman : In the backstory Diana's mother Hippolyta, Queen of the Amazons, was once enslaved by the demi-god Heracles sent by Ares in his war against Athena along with her people for his sexual desires. Along with being a slave Super Soldier , Fenris is implied to have been this under his former master Danarius. He's too late to save the daughter's best friend, but does manage to save his child.