Cooan

As the youngest sister of the Black Moon clan, this fire-wielding antagonist serves as a dark mirror to Rei Hino. Using her "Dark Fire" technique and deceptive charms, she infiltrates T*A Girl's Academy under the alias Kurozaki Cooan to lead a paranormal club. Driven by vanity and a desperate desire for Rubeus's affection, she competes with her siblings for his love while executing missions to recruit humans to their sinister cause.