Mitsuna Hizuki is a supporting character in the anime Shin Ringetsu, which adapts a visual novel. She is the youngest daughter of the Hizuki family, a household bound by a longstanding pact with the Rindo clan to counteract a generational curse. Raised entirely among her older sisters and other women, Mitsuna grew up with little exposure to men and consequently lacks practical knowledge about them, though she does not view this as a disadvantage. Her personality is marked by innocence and a cheerful detachment; she often unconsciously blurts out curious facts she has picked up from reading, revealing a bookish but unworldly nature. In the story, she plays a minor role within the larger narrative concerning Naoto Rindo’s need to choose a bride from the Hizuki sisters. Her interactions are primarily with her siblings—Ayumi, Shino, Suzune, and Yuiko—and she is depicted as a gentle presence in the household. Mitsuna appears in a school uniform, with brown waist-length hair often styled in twintails with ribbons, and brown eyes. The OVA does not explore significant character development for her, as the plot concentrates on the main romantic and supernatural conflicts, but she remains a recurring figure in the domestic scenes that illustrate the Hizuki family dynamic. She has no displayed supernatural or combat abilities, and her importance lies in her role as the youngest sister within the family’s central conflict.