Queen Metaria (クイン・メタリア Kuin Metaria, called "The Negaforce" in the original English dub) is a malignant, amorphous energy being, and the true mastermind of the Dark Kingdom. She was born as a result of abnormality in the Sun.:Act 10 Like all arch-villains in the Sailor Moon manga, she is an incarnation of the final arch-villain, Chaos. While the first official English release of the manga in English spelled her name as "Metalia", it was a translation error and reprints of the manga in English as well as multiple reprints in Japanese consistently depicted the character's name spelled as "Metaria" in Latin letters.:Table of Contents:Table of Contents
Being responsible for the fall of the Silver Millennium, Metaria used her power to corrupt the majority of Earth's population, including Beryl whose affections towards Endymion the entity exploited, into attacking the Moon Kingdom as Prince Endymion and Princess Serenity were to wed. The battle came to an end when Metaria is sealed away by Queen Serenity in the area of the North Pole known as D-Point.:Act 12 In the 20th century, Metaria summons a reborn Beryl back into her service to obtain the Silver Crystal and take its power as her own.:Act 7 After Endymion's reincarnated form is captured, Metaria turns the youth into a thrall to retrieve the then powerless Silver Crystal while sacrificing Beryl in the process.:Act 11 When Sailor Moon's attempted murder-suicide of Endymion restores the Silver Crystal, Metaria makes her move and absorbs the crystal while wiping out all life on Earth. But after Sailor Moon and Mamoru escape with the crystal thanks to the Sailor Guardians' sacrifice, the form eventually destroys Metaria by targeting the star mark on her forehead and then uses the Silver Crystal's power to restore everyone to life.:Act 12
In the first anime adaptation, Metaria is much the same, with a few exceptions. She eventually becomes powerful enough to resurrect on her own and takes possession of the dying Beryl, transforming into a towering goddess-like creature who is eventually destroyed by Princess Serenity.
In the live-action series, Beryl originally intends to use the Silver Crystal to control Metaria, but later learns that the gem's power only makes Metaria stronger due to Usagi's rage being transmitted through it. This escalates to the point where Beryl can no longer control the actions of her own Monsters and fears that Metaria may destroy everything. Metaria later transfers her will into the strongest Monster in its service. In a vain attempt to stop Metaria, Endymion takes the creature into his own body with the intent of committing suicide in order to take it with him. Instead, Metaria takes control of Endymion and uses him in an attempt to force Sailor Moon to use the Silver Crystal's power. Metaria's plan succeeds, but only after Sailor Moon is forced to kill Endymion and Metaria with him. Sailor Moon revives Mamoru with the Silver Crystal's power, with Metaria gone for good.
In the anime series, her voice actresses are Noriko Uemura in the first series and Yōko Matsuoka in Sailor Moon Crystal. In the DIC English adaptation, she is voiced by Maria Vacratsis. In the Viz Media English adaptation, her voice is supplied by Mary Elizabeth McGlynn. In the live-action series, she was portrayed by Miyū Sawai.