Excel /エクセル

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About : After she is rescued by Steiner from "alter egos", who killed her younger brother, she asks Steiner to make a contract with her to make Steiner stronger. Her childlike appearance is the result of a mutation caused by her contract with Steiner; it severely slows down her physical growth and aging process. As a veteran contractee, she has gained considerable experience and a keen insight. She possesses several combat accessories called "thousands", but only two are shown in the manga. One is the H...