Aya Mikage is a fictional character from the manga and anime series Ayashi no Ceres, created by Yuu Watase. She is a high school student who discovers that she is the reincarnation of a celestial being known as Ceres. This revelation leads her to confront various challenges, including family conflicts and supernatural threats. Throughout the series, Aya struggles with her identity and the powers that come with being Ceres. Her journey involves navigating complex relationships, particularly with her twin brother, Aki Mikage, and her love interest, Tohru Sayaka. Aya's character embodies themes of self-discovery and resilience.