Neo-Queen Serenity (anime)
Neo Kuīn Sereniti
Crystal Tokyo, Earth
Queen of Crystal Tokyo
Human (with extended longevity)
Kotono Mitsuishi (original anime)
She wears an altered version of the dress she wore as a princess, with the shoulder pieces omitted and a large, wing-shaped bow replacing the smaller one of the princess outfit. Her blonde hair is much longer. She also wears a crown and new earrings. The crescent moon is always visible on her forehead, just as it was with her princess form. Her face and facial expressions are drawn to look more mature than the 20th century Usagi, but her iconic hairstyle is retained.
In the original anime and manga series, this form is the one that Chibiusa considers as truly being her mother, while Usagi of the past is regarded as more of a big-sister figure and many characters often mistake them for sisters. Although aware of the situation, Chibiusa rarely does this.
Sailor Moon R
In the second season, it is revealed that Usagi, as Serenity, will eventually become the queen of a new Silver Millennium called Crystal Tokyo, which will already exist in the 30th century; where the Earth and the Moon coexist in harmony and prosperity. She is first seen in this future form in Episode 68 of the anime. Usagi learns that she will be given the title "Sovereign of Earth" and Mamoru will become King Endymion alongside her.
She becomes Neo-Queen Serenity after warding off a second Ice Age, though the specifics of this are never discussed. This incarnation is shown to be more mature than the present day Usagi, though she still has her moments—in Episode 104, Chibiusa gives the Senshi a letter from the future, in which the Queen asks them to train her—the letter is simplistic and contains almost no kanji. This proved that even after centuries of taking the Moon Kingdom throne, she still cannot write fluently in kanji. Also, in Episode 146, Diana says that the King and Queen sometimes play sick to get out of things. Letters she sends though the Space-Time Door to Chibiusa are sometimes signed with a drawing of herself (and sometimes King Endymion) instead of a name.
However in both manga and anime versions, it is clear that the world becomes reformed under her powers, ridding the known world of evil and sickness. This caused her, and the rest of the people of earth to become extremely long-lived with extended longevity of living for hundreds or thousands of years. The immeasurable and vast power of the Legendary Silver Crystal keeps the city of Crystal Tokyo stabilized (in the manga, King Endymion says that they can live up to about one thousand years). Sailors Uranus, Neptune, and Pluto refer to her as the "Messiah of Peace" or the "True Messiah" standing opposite to the Messiah of Silence, Mistress 9.
Although she never makes a direct physical appearance after the events of the second season, Neo-Queen Serenity sends Chibiusa to the past to train under the Sailor Senshi as an even stronger and more experienced Sailor Chibi Moon by the time she returns. She often sends notes with a small drawing of herself
- She is minor recurring character in the series.