A nurse at the hospital where the protagonist's friend is hospitalized.<br /> <br /> Although she graduate from nursing school with top grades, she has a friendly and humble personality.<br /> She's a bit of a headstrong person, and will not be intimidated by men or her superiors when she speaks her mind.<br /> She is trusted by those around her and is referred to as a 'Shadow Matron'.<br /> Due to going to an all-girls school, she is not familiar with the opposite sex.<br /> <br /> Aya is concerned about her lack of femininity. She's similar to Akemi, and the protagonist wants to taste her body as well.<br /><br />