Sadie moved to Japan when she was 10 years old. She only knew some Japanese and could only read and write a little, but once she learned enough, Sadie started at Kunugigaoka Junior High as a first year. That's where she found Karma. He doesn't remember but he was the first person to speak to her. She's had a crush on him ever since. Every school year they had the same homeroom until third year when Karma was transferred into Class E. Up until then she would follow him around school but never outside of school. And she never peeped in the locker rooms either. Since she watched him all the time, Sadie witnessed the fight between Karma and the valedictorian. She has also heard what their homeroom teacher said about "Always being on his side" She was also down the hall when Karma was suspended. Sadie was just as furious as Karma was. She tried to stick up for him and was given a warning that if she did it again, she would be transferred with him! She was also suspended, but only for a few days.