Monshiro Kuki is the youngest member of the Kuki Family. She has two siblings: the older sister Ageha Kuki and the older brother Hideo Kuki. Monshiro is one of the new female heroines to appear in Majikoi S. Monshiro transferred to Kawakami Academy to class 1-S, with the Kuki Family's butler, so that she is taken care of in school.