Mizuki Inuhiko is a student at Ikai High School and a classmate of Ouri Kagami, along with Hiroshige Ushijima, Sumitori, and Nozomi Kasuga. She is described as a very observant person with a personal ambition to become the president of the student council. Her role in the story is that of a supporting character, primarily appearing within the school setting as part of Ouri's everyday life, providing a glimpse into the normal world that contrasts with the supernatural conflict involving the Shikabane Hime. Physically, she is a teenage girl with long brown hair that reaches her waist and black eyes. The available information does not detail any specific combat abilities, supernatural powers, or significant character development throughout the series, nor does it provide deeper background or exploration of her motivations and relationships beyond her school interactions and goal of student council leadership.