The main heroine, a responsible sixteen-year-old who handles cooking and chores well. When she was younger, she fell down a cliff but was saved by Hakuya. The incident left her with a scar and little memory of the event, as she doesn't remember Hakuya when they meet again. Over time she recalls more of her memories of the incident, later learning she had received half of Hakuya's inhuman power, the side effect of which gives her fever on occasion. In school she is noted for her cute face, large bust and (as Mashiro puts it) "child-bearing hips" (which she is conscious of). She is also very conscious of the unwanted attention she receives for being the student council president's younger sister.