After the Amazoness Quartet were defeated and reverted to their Amazon Stones, Sailor Saturn brought the Stones to Neo-Queen Serenity and asked her to use her power on them. When she did the Sailor Quartet appeared, and Sailor Ceres explained that they had been sleeping in the Amazon until Sailor Mini Moon needed them as guardians. The four Sailor Scouts then returned to their sleep until the 30th century. In the Stars arc of the manga the Sailor Quartet appeared as Sailor Mini Moon's guardians, and helped her fight.