Sayaka Nagisa

Sayaka Nagisa is a former task force officer in the Japanese Army and the strategist of the Changemen. Calm, disciplined, and analytical, she often approaches battle with careful planning and a sharp eye for detail.

Her focus on discipline sometimes causes her to worry too much about the etiquette and behavior of her teammates. Beneath that serious exterior, however, Sayaka is deeply caring and emotionally sincere.

She shows a gentle side through her affection for animals and her feelings for Hiryuu Tsurugi. As Change Mermaid, Sayaka provides the team with intelligence, compassion, and steady battlefield judgment.