Tsuchimikado Motoharu's sister is a character from the light novel series Toaru Majutsu no Index. She is known for her strong bond with her brother, Tsuchimikado Motoharu, and plays a significant role in his life. Her character adds depth to the story, showcasing themes of family and support. In the series, she is depicted as caring and protective, often concerned about her brother's well-being. Her presence highlights the importance of familial relationships in the narrative, contributing to the overall development of Tsuchimikado Motoharu as a character within the Toaru universe.