Stephanie Wilton was a human born on Earth in the 20th century. She and her younger brother James discovered the skeleton and music box of Rees in a well in 1950. Stephanie kept the music box, which actually possessed a portion of Rees' consciousness and ability and he mentally spoke to her for years, influencing her and using her as a puppet.
In 1964, Stephanie followed Rees' orders and attempted to once again find his body at the bottom of the well, having used his ability through her to secure the property by taking out key civil servants and property developers. This attracted the attention of the Counter-Measures team, and thanks to their efforts, they were able to stop Rees reuniting with his decayed corpse, now only a skeleton, but at the cost of Stephanie's life. (AUDIO: The Reesinger Process)