Kiri Shiratori is the firstborn to a wealthy family who owned coffee plantations, amassing a large fortune from the selling of coffee beans. When she became a first year in high school, she saw Darjeeling during a parade and was awestruck by her graceful and elegant demeanor. As such, she aspired to be like her, going so far as to mimic her appearance and taking up Sensha-dō at West Kureouji Grona Academy, rising in the ranks to become the overall commander of her team.