The third arc revolves around a group of lifeforms called the Death Busters, created by Professor Souichi Tomoe, who seek to transport the entity Pharaoh 90 to Earth to merge with the planet. Tomoe's daughter, Hotaru, is possessed by the entity Mistress 9, who must open the dimensional gateway through which Pharaoh 90 must travel. Car-racer Haruka Tenoh and violinist Michiru Kaioh appear as Sailor Uranus and Sailor Neptune, who guard the outer rim of the Solar System from external threats. Physics student Setsuna Meioh, Sailor Pluto's reincarnation, joins the protagonists. Usagi obtains the Holy Grail, transforms into Super Sailor Moon, and attempts to use the power of the Grail and the Silver Crystal to destroy Pharaoh 90. This causes Hotaru to awaken as Sailor Saturn, whom Haruka, Michiru, and Setsuna initially perceive as a threat. As the harbinger of death, Hotaru uses her power of destruction to sever Pharaoh 90 from the Earth and instructs Setsuna to use her power over time-space to close the dimensional gateway.