The moment Kaori was born, her mother, Shinya, saw potential in her eyes and knew how her daughter's future was going to unfold. Kaori's mother was a music prodigy, a quite famous one at that. Shinya was a famous violinist, a master at it, she played very emotional music and even some intense music with the violin. Her mother used to do private sessions with clients to also teach them how to play, it was a side-job that paid quite well, since violin lessons were a bit expensive. Shinya mainly made her money from performing on stage at events, even performing the national anthem at major sport events, like the Olympics. When Kaori was old enough, Shinya began to teach her daughter how to play the violin. Kaori wasn't a very active child, disliking sports and being outside too long, unlike their father who was a professional tennis player and had originally wanted to teach Kaori to follow in his steps, but whenever he tried to, Kaori would whine to go back inside or whine she didn't like tennis. This somewhat disappointed her father but it couldn't be helped. Kaori began to master the violin quite quickly, she loved it, and she loved her mother more than anything, they had an unbreakable bond, especially now that they spent so much time together practicing their violin skills. 

One day, Kaori even got to perform with her mother on stage, it was a magnificent event and the two were applauded for their gifted skills. Kaori was beyond happy, and despite the anxiousness she had on stage from performing for the first time in front of thousands and even more on television, it was worth being able to do it with her mother, though, Kaori still had a lot to learn. Unfortunately, Shinya was soon diagnosed with brain cancer and was told a certain amount of months she had to live. This depressed the mother but she didn't have the courage to tell her daughter who loved her so much. Shinya decided to keep it a secret and continued to try her best to teach everything she could to her daughter, who could hopefully carry on her name. Kaori was progressing well, but not long later, Shinya eventually passed away. This devastated the young Kaori, and her father. Kaori wouldn't speak to anyone for weeks, sitting in her room, crying herself to sleep at night, refusing to play the violin. Til one night her father came into the room and began to play Shinya's favourite song on Kaori's violin. Kaori had no knowledge that her father too, knew how to play the violin, but it turned out, he had learnt the song after his wife had passed away, just so he could play it to his depressed daughter. 

Kaori appreciated this more than anything and hugged her father and soon went back to practicing the violin. Kaori for the most part stood away from performing on stage, whenever she wanted to go, she would cancel the event because of stage fright. The only time she had performed was with her mother, and to do it without her not only made her sad inside and want to cry, but it made her anxious, so anxious that she would not be able to breathe til she got out of there. So for now, Kaori refuses to get on stage, and it has been on many newspapers, people questioning where the legendary Shinya's daughter had vanished to. 

Kaori now just attends University, taking her basic studies, however, a program offered her to be able to teach a class the violin as a job to help pay for her studies, and she accepted.