Sailor Saturn  Years prior to the story, Hotaru was eight years old and living with her parents in Tokyo's Sankakusu District prior to a freak storm which caused a fire that killed her mother Keiko and left her on the verge of death herself. Later admitting that she was meant to die at the time, Hotaru's life was unnaturally prolonged by both the actions of her father Souichi Tomoe turning her into a cyborg and being made a host to the Daimon Mistress 9 whose presence caused Hotaru's body to suffer seizures with only the Tairon Crystal appearing to reduce the pain. Wearing clothes to conceal her altered body, unaware of Mistress 9's existence prior, Hotaru was friendless prior to meeting Chibiusa. By the time Hotaru realized Mistress 9's existence, she loses her body to the Daimon as she steals Chibiusa's Legendary Silver Crystal to fully regain her strength. Hotaru is also revealed to be the reincarnation of Sailor Saturn who was responsible for destroying the last remnants of the fallen Moon Kingdom Silver Millenium so it can begin anew of Earth. This fact and her power made her feared by the Outer Guardians as they initially intended to kill Hotaru and seal her soul before she could awaken and destroy Earth. But Hotaru, seemingly destroyed when Mistress 9 ripped herself out of the human's body, ended up awakening as Saturn when Master Pharaoh appeared and Sailor Moon appeared to have died in a gambit. Though Saturn intended to destroy Earth along with Pharaoh 90, she stays her hand upon seeing Sailor Moon alive and deemed destroying Earth so it to be renewed for the new Silver Millenium not needed. She then drives Pharaoh 90 to his domain while sacrificing herself to ensure he remains trapped, though Sailor Moon's restoration brings Hotaru back to Earth as a human infant. With Tomoe dead, Hotaru becomes the adopted daughter of Haruka Tenoh, Michiru Kaioh and Setsuna Meioh as the four of them reside at an Empire Victorian House. In the first anime, Hotaru's story is mostly the same except that she was not modified into a cyborg and Mistress 9 had a stronger influence that played a role in her being ostracized by her classmates. Her father also survived the Death Busters' defeat and was allowed to raise her until Sailor Pluto asks for her help in the first part of "Sailor Moon Stars". Hotaru's age fluctuates during the series; she is first introduced as a 12-year-old, is reborn as an infant, quickly develops into a young child around 4, 5, or 8 then reaches her proper chronological age after a metaphysical epiphany.