Torture Princess: Fremd Torturchen (Japanese: 異世界拷問姫, Hepburn: Isekai Goumon Hime) is a Japanese light novel series created by Keishi Ayasato and illustrated by Saki Ukai. Media Factory published the series in Japan from April 2016 to February 2020 under their MF Bunko J label. The story focuses on Kaito, a young man who after being strangled to death by his father is summoned to another world by the Torture Princess, Elisabeth Le Fanu. Working as Elisabeth's butler, Kaito aids Elisabeth in her assignment to destroy fourteen demons that torment the world.