By the time she realized Mistress 9's existence, she loses her body to the Daimon as she steals Chibiusa's 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 Sailor Saturn when Pharaoh 90 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 an infant. With her father 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.