|Birthday||4th July (Cancer)|
|Relatives||Yoshiyuki Miyazono (Father)|
Ryouko Miyazono (Mother)
Unnamed Paternal/Maternal Grandparents
|Japanese Voice||Risa Taneda|
|English Voice||Erica Lindbeck|
Kaori is a very beautiful girl. She has yellow waist length or mid-back length hair and grey eyes, which makes her look like a foreigner. Her height is average for her age while her body is noted as frail and delicate. Following her hospitalization, Kaori's hair and skin color began to fade into a duller hue.
Kaori is a free-spirited violinist whose playing style reflects her personality. She is often friendly and encouraging. Kaori has many interests, however one thing that remained constant after meeting Kousei when they were younger was her passion for the violin. Kaori likes to depend on herself and only herself and can be seen as more of a support for others. She always puts up a smile in front of others, regardless of how she feels, to avoid her friends worrying about her.
While considered a great violinist from a theoretical perspective, she often eschews details of the score and its historical and traditional interpretations. One of the judges at Towa Hall, during the first competition of the series, noted that her abilities far exceed the others in the competition. She wields a free-spirited style of performance that emphasized emotion and artistry over strict interpretation of the score and the composer's intent. Her music inspired Kousei to regain his passion for the piano and redefine himself as a musician.
When Kaori was five years old, her class went to see a music recital, where she first saw Kousei. From the moment he touched the keys and started playing, she was immediately inspired by the spirit in his music.
Kaori was always a physically weak little girl and underwent many surgeries. Despite so, her hospitalizations became more frequent and prolonged, which lead to her often missing school and practice. One night, possibly eavesdropping or simply walking by, she observed her mother cry and her father consoling her in the hospital lobby. She then discovered she didn't have much time remaining to live, and shortly after she realized it herself through the recurrent hospitalizations and developing weakness. Being a young girl, she struggled through this; however, Kaori still adored playing the violin.
Shigatsu wa Kimi no UsoEdit
Kaori's parents own a bakery shop that further develops her happy-go-lucky and free-spirited personality. Kaori loved children as she was often seen interacting with children.
Kaori was hiding her illness from Kousei's group. This was first shown when she collapsed after her first performance with Kousei. At the time, she claimed to be anemic. However, there were many suggestions of more severe health concerns: she was shown, for instance, with a large pile of medication during Kousei's competition, and was unable to participate in her callback round with Kousei during her prolonged hospitalization. It is later revealed that she was unable to perform with Kousei after she fell and hit her head at home. When Kousei heard from Tsubaki Sawabe about Kaori's hospitalization, he rushed to visit her.
It later became obvious that her health is deteriorating rapidly, and she could no longer hide her illness from her friends. Her illness began causing bouts of paralysis in her legs, she is shown suddenly falling to the ground while walking down the hallway in the hospital, unable to stand up again.
As Kaori's surgery approached, she wrote a farewell letter to Kousei. On 18th February, the day of Kousei's piano competition, Kaori underwent surgery. But, despite the doctor's efforts, she died at the age 14 years old. At her funeral, her letter was given to Kousei by her parents.
In high school, she managed to meet Kousei. After getting to know each other, they both realised that, as musicians, they had a lot in common. Kaori first discovered that Kousei became tone-deaf when she asked him to play in a cafe and noticed him struggling with it. She then demanded Kousei to be her accompanist. Although reluctant at first, Kousei finally accepted when Kaori begged him to support her in the 'moment that she's about to lose heart.' Their relationship gradually strengthened and they start spending more time together, especially in the music room. Kousei found himself falling in love with Kaori, but held back because he knew Watari was interested in her.
At the end of the series, in Kaori's letter, it is revealed that she had a crush on Kousei since they had been young, and that she had lied about her crush on Watari just so she could be near Kousei. After her death, Kousei was depressed.
Watari is Kaori's supposed love interest throughout the series. Both of them are very close friends and tend to act lovey-dovey around each other. It is later revealed that she had faked interest in Watari just to get close to Kousei. Watari was immediately infatuated with Kaori's appearance when he first met her, but still remained a ladies' man, chasing after other girls at school. Nonetheless, he is shown to care for her and visits her frequently when she is in hospital, bringing gifts and making her laugh. In Kaori's letter for Kousei, she claims that Watari was an amazing friend but will probably forget all about her; however, it is visually suggested that he really did like her.
Both Kaori and Tsubaki can be seen traveling home together throughout the series, and they are shown to be good friends. Kaori asked her to introduce her to Watari thus, Tsubaki ultimately gave her the opportunity to meet Kousei. Kaori tried to meet Kousei in such a roundabout manner because she knew that Tsubaki would not respond well if she directly asked to be introduced; in her letter to Kousei, she mentioned that she knew Tsubaki was in love with Kousei from the very beginning. Tsubaki liked Kaori as a friend, but realized her own feelings for Kousei after she noticed Kaori and Kousei's relationship developing.