diff.text: In the manga, Hotaru's mother died in a laboratory fire. Hotaru was only a small child at the time, and was severely injured. Her scientist father integrated technology into her body, and made her into a cyborg. The machine additions to her arms and legs were clearly visible, so Hotaru made a necessary habit of wearing long sleeves and tights with every outfit. During her recreation as a cyborg, her halfnear-mad father planted an alien egg into her that made her into Mistress 9's physical host.