一瀬家の従者で、日本帝鬼軍の少尉。幼少からグレンに好意を持ち、グレンの心の支えとなる存在。「月鬼ノ組」では、隊員活動を行う傍ら、月鬼ノ組研修教室の教職も務めている。
Sayuri is a servant for the Ichinoses, and is Second Lieutenant of the Japanese Imperial Demon Army. Since young, she had a crush on Guren and is his emotional support. While serving as a member of The Moon Demon Company, she is also an Army instructor for the training classes.
