Sailor Quartet
Origins
From left to right: Sailor Vesta, Sailor Pallas, Sailor Ceres, and Sailor Juno. Their matching uniforms are similar to, but not exactly like, those worn by the planetary Senshi in Stars.
In the manga, they are actually the Sailor Quartet--commonly referred to in English-speaking fandom as the Asteroid Senshi, because they are named after the first four major asteroids to be discovered. They had been placed in a deep sleep, awaiting the time when they could become the future protectors of Sailor Chibi Moon, analogous to Princess Serenity's four soldiers (the Guardian Senshi) and to Prince Endymion's four generals (the Shitennou). However, Queen Nehellenia woke them prematurely and forced them to work for her. At her defeat, they return to their true forms and to their long sleep. During the fifth story arc, they accompany Sailor Chibi Moon from the future to help in the fight against Sailor Galaxia.
In the anime, the Quartet are never Sailor Senshi, coming instead from Elysion, the land of dreams. They began working for Queen Nehellenia when she heard them playing and offered to keep them from ever growing old. She changed their dreams into the physical form of Amazon Stones, instructing them to use these to remove the "dream mirrors" of humans. They are dedicated to this task, but still generally spend more time playing than working. When this goes too far for Nehellenia's tastes, she drains their powers and in the end they break their Amazon stones and give up eternal childhood to help the Sailor Senshi and Pegasus. They part ways noting that it is possible that destiny will have them meet the Sailors again, even though they never show up in Sailor Stars.
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. The uniforms have one-layer skirts, belts, chokers and back-bows like those on the Sailor Team's first uniforms, with boots, gloves, brooches, leotards, and tiaras the same as the final forms. Their shoulder pads are in the style of the final uniforms, but are white. Each member has unique earrings.
The Quartet appears in several of the stage musicals, with a substantially different background. Here they are homonculi created by Professor Tomoe, and are known as the Sammael Quartet. They are portrayed as young children around Chibiusa's apparent age, instead of their normal ages. They are created from Chibiusa's starseed, and are linked to her, having the power to transform into Sailor Senshi as a result.
