The protagonist of the story, a 15-year-old girl who is murdered but revives to find herself with a strange left arm. She initially wants to die and join her foster parents, but is convinced by Sudo to live and find a new place where she can belong.

She constantly depends on Sudo for support during her missions and feels unsafe without him, as is implied during the mission to destroy Nana. Although she hated her left arm for being a Chimaira, she finds out in a dream later that her left arm belonged to her father, who had been given Chimaira treatment. Feeling comforted, she emboldens her resolution to not become a monster and uses her arm only to protect what she feels is precious.

Throughout the entire story, she maintains a close relationship with Sudo and it is heavily implied that they care for one another. She and Sudo betray the organization later and she lives through the self-destruction.

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