Kurumi Nonaka

Kurumi Nonaka is a member of the Hero Clan in Japan and the younger sister of Yuki, making her the youngest child of Shuuya and Kaoru Nonaka. 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 Basara's girlfriends. Kurumi is first shown to be very protective of her older sister and is also dutiful to her position as a hero. She also held no sympathy for Basara after the incident from five years ago, even calling him a traitor due to a mixture of the grief that it caused her sister, protecting the daughter of the Demon Lord, despite her being initially being close to him thinking of Basara as an older brother. She didn't hesitate to attack Basara in their battle against one another, then even showed to be insulted after he didn't take her seriously as he used to blunt end of Brynhildr to attack her. However, after Basara saved her from falling and hearing his suffering as he slept upon being knocked out by Yuki, she realized that he was suffering most after the incident out of the three of them. Kurumi started referring to him as "Basara-oniichan" as she had done in the past. She quickly developed a close bond with those in the Toujou Residence, but Kurumi is described as having a certain innocence, which riles up the succubus instinct in Maria into the depths of depravity becoming both a sexual plaything for her yet close friend. This close proximity, however, it also forces her to confront her long-standing feeling for Basara, which at first caused her to shyly use her spirits to simulate a muted dream for her a couple of months in a row. Kurumi later starts to become jealous about the fact that Mio, Yuki, and later Zest were able to make a Master-Servant Pact with Basara. Then the actions of the Succubi Lucia and Shella forcibly brings these feelings to the surface by cursing her and making Basara subdue her, repeatedly.