Ceres, Celestial Legend, known in Japan as The Mystery of Ceres , is a Japanese manga series written and illustrated by Yuu Watase. It was originally serialized in Shōgakukan's magazine Shōjo Comic from May 1996 to March 2000, with its chapters collected in 14 tankōbon volumes. The manga was licensed for English release in North America by Viz Media. The series focuses on Aya Mikage, who learns on her sixteenth birthday that she is the reincarnation of an ancient and supremely powerful celestial maiden or angel (tennyo) named Ceres, and her twin brother Aki the reincarnation of Ceres' former husband, Mikagi, the progenitor of the Mikage family, who had stolen Ceres' robe. Ceres' spirit begins manifesting in Aya, and to save her brother she must find Ceres' long-lost celestial robe, while avoiding being killed or captured by family members who want to use Ceres's supreme celestial abilities for their own personal gain.

Yuu Watase is a Japanese manga artist. She debuted in 1989 at the age of 18 with the short story "Pajama de Ojama" and has since published more than 50 volumes of one-shots and long-running manga series. One of her most popular titles is Fushigi Yûgi. In 1998, Watase won the 43rd Shogakukan Manga Award in the shōjo (girls') category for Ceres, Celestial Legend. In 2008, she began her first shōnen (boys') serialization, Arata: The Legend.