They are actually the Sailor Quartet—commonly referred to in English-speaking fandom as the Asteroid Guardians, because they are named after the first four major asteroids to be discovered. The four asteroids hold particular importance because they were originally considered planets in history before more were discovered. They had been placed in a deep sleep somewhere within the Amazon Jungle, awaiting the time when they could become the future protectors of Sailor Chibi Moon, analogous to Princess Serenity's four Inner Guardians and to Prince Endymion's four Four Kings of Heaven. However, Queen Nehelenia woke them prematurely and forced them to work for her. At her defeat, they are returned to their true forms by Usagi (in the form of Neo-Queen Serenity) and to their long sleep. During the fifth story arc, they accompany Sailor Chibi Moon from the future to help in the fight against Shadow Galactica. The Sailor Quartet's uniforms are a cross between those worn by the Sailor Team in their first forms and their final forms, with the Quartet's own image colors. They are shown using two attacks as a group: Pink Lady's Freezing Kiss (all four of them plus Sailor Chibi Moon) and Amazoness! Jungle Arrow (used by the four Quartet members).