She is an Elemental Master with a strong connection with spirits. At first, she appeared as one of the three sent to eliminate Mio, upon joining the Toujou Household , she becomes one of the main female characters in the series. Kurumi is a petite young girl who is surprisingly developed for her age with blue-violet hair tied up in a ponytail most of the time using a white scrunchy and yellow eyes just like her older sister. Her battle outfit is tightly wrapped around her slim figure and it appears to be the typical attire for female Heroes, which consists of a navy blue leotard with a black collar and white skirt; and Kurumi also wears short tights underneath her skirt and a navy blue cape similar to her sister. All four of her limbs are covered by her spirit armor and her Spirit Gauntlet is also placed on her left forearm. Kurumi is first shown to be very protective of her older sister and is also dutiful to her position as a hero.