Ceres is a central figure in the narrative, introduced as a supremely powerful celestial maiden, or Tennyo, from ancient myth. Her background is rooted in tragedy and betrayal; she was once hesitant to marry a human man named Mikagi, who would become the founder of the Mikage family. The defining act of treachery that shaped her existence was Mikagi’s theft of her hagoromo, her celestial robe. Without this robe, Ceres was stripped of her ability to return to her home in the heavens, forcing her to remain on Earth. This event cursed her with a deep-seated rage, and she is prophesied to one day exterminate the entire Mikage bloodline as retribution for the suffering she endured.

Ceres’s personality is a volatile mixture of ancient fury and profound sorrow, a direct result of her traumatic past. She is often perceived as vengeful and cold, driven by a singular need to punish the descendants of the man who wronged her. However, glimpses of a more compassionate and gentle nature surface on rare occasions, suggesting that her core identity is not solely defined by vengeance. One notable instance of this is when she takes control of her host’s body to give a sick, wheelchair-bound boy named Shouta the experience of flying, performing the act for no ulterior motive other than kindness.

Ceres’s primary motivation is the recovery of her stolen celestial robe. Only by reclaiming this part of herself can she regain her true form and full power, finally allowing her to leave the earthly realm. This quest is intertwined with her anger, as the robe is a symbol of her imprisonment and loss. She seeks a way to return to the heavens, and her cooperation with the human protagonist, Aya Mikage, is contingent upon this goal. Aya, who is a direct descendant of Ceres, acts as the medium for Ceres’s spirit to manifest in the modern world. Ceres emerges when Aya experiences extreme stress or fury, taking over her mind and body. The story’s central dynamic is the difficult coexistence between Ceres and Aya, as Aya struggles to control the celestial maiden’s influence and makes a desperate promise to help find the robe in exchange for Ceres sparing her family, especially her twin brother Aki.

Key relationships define Ceres’s role in the story and her development. Her bond with Aya is a tense cohabitation, with two distinct souls sharing one body, each fighting for control and possessing different objectives. Her relationship with her former husband, whose spirit possesses her descendant Aki, is one of bitter enmity; he represents the source of her centuries-long imprisonment and suffering. Furthermore, Ceres has a profound, indirect connection to the character Toya. It is revealed that Toya is not a normal human but was created by the power of Ceres’s own celestial robe, the hagoromo, which spent millennia evolving into a living humanoid organism intended to help reunite with her. This makes Toya intrinsically linked to Ceres’s quest for wholeness and her legacy.

As a celestial maiden, Ceres possesses a vast array of supernatural abilities that manifest when she takes control. These powers are formidable and include the ability of unaided flight, teleportation, telepathy, and powerful telekinesis. She can project destructive blasts of pink celestial energy from her hands and create impenetrable shields or barriers of the same energy. Other notable abilities are superhuman speed and premonition, solidifying her status as a being of immense and terrifying power that the Mikage family both fears and seeks to exploit.