Ceres: Celestial Legend (Ayashi no Ceres) is a 14-volume shoujo manga series by Yuu Watase, the creator of the popular manga/anime series Fushigi Yuugi. There is also the anime with the same title, which runs in 24 episodes in length.
The story revolves around a teenager girl named Aya and her twin brother Aki, members of a wealthy and powerful Mikage family. On their sixteenth birthday, they are called to gather in their family home to be given a special present. The present was actually some sort of test -- which Aya failed. She is found to possess the incarnation of a tennyo (celestial maiden), and when shaken, she will transform into Ceres, the tennyo. According to the legend, if left to live, the reincarnation of Ceres will bring ruin upon the Mikage family. Aya quickly found she is hunted to death by her own family.
Ayashi no Ceres was serialized from 1996 to 2000 in the bi-weekly Japanese manga magazine Shoujo Comic (Sho-Comi). The original Japanese title is Ayashi no Ceres - Tenkû o-togizôshi, which the literal translation is "Bewitching Ceres - Heavenly Fairy Tale". The original title was changed for North American release.