

Once she became Queen, Serenity ceased to age, and continued to retain her youthful appearance for well over ten centuries. Through the power of the Silver Crystal the people of the Earth became functionally immortal. Some time after the 20th century the Earth was struck by an unspecified disaster, and after it was saved by Usagi in the 30th century she ascended to power as Neo-Queen Serenity. Also, Diana spoke of the future King and Queen both falling ill just before stuffy official ceremonies, and miraculously recovering as soon as they were over. She also had a penchant for using smiley faces in her letters, as well as heading them with a cute drawing of herself. For example, she sent an unusually cute letter with Chibiusa to Usagi and Mamoru, which demonstrated the fact that even after several centuries she was still unable to write well in kanji. Neo-Queen Serenity was much more composed and regal than her younger self, but there were hints that she still retained some of her goofy traits. In both the anime and manga canon, Neo-Queen Serenity sent her child, Chibiusa, into the past to train to be a Sailor Senshi after the threat in the future ended.

The details of her ascension to the throne and the subsequent attacks varied according to the source. She ascended the throne along with her husband, Endymion, and ruled all of Earth from the Crystal Palace (situated in what was formerly the Juuban district) with the power of the Silver Crystal. Neo-Queen Serenity was the future form of Sailor Moon. She was an important character in the series, and first appeared in the Black Moon story arc. Neo-Queen Serenity was the Queen of Crystal Tokyo and the resurrected Silver Millennium.

Kotono Mitsuishi ( anime, Crystal) Terri Hawkes ( dub), Linda Ballantyne (dub 83+) Stephanie Sheh ( Viz dub) Protect Chibiusa! Clash of the Ten Warriors Usagi Tsukino, Sailor Moon, Princess Serenity Ikuko Tsukino (mother), Kenji Tsukino (father), Shingo Tsukino (brother), King Endymion (husband), Chibiusa (daughter)
