Tsugumi has shy, easily excitable personality, having come from a cozy life, Tsugumi still finds it a little hard to adapt to the DWMA, a place chock-full of strange things and people steeped in the supernatural. Out of all the academy students, she is shown to be the most normal if not mundane, because of this she is slightly reluctant around people she's not acquainted with and can get frightened or very nervous easily. She is also embarrassed very easily, often blushing. She is rather naïve and believes (and fears) in the supernatural, as she believes Kana Altair's tarot card readings straight away, before learning Kana fabricates many of her cards. This is rather ironic as she is a Demon Weapon, a person with the supernatural ability to transform into weapons.