Kaori (香織) was Rin Hojo's arranged fiance at the time due to her family's business relationship. However, Kaori ended up falling for Ryosuke Takahashi and was determined to pursue a relationship with him despite her father's disapproval. In response, Rin verbally abuses her out of frustration, claiming her family will suffer as a result. In the end, Kaori commits suicide leaving both Ryosuke and Rin heartbroken with the latter becoming murderously vengeful against Ryosuke.
Kaori is based on Aya Kiguchi (木口亜矢), a Japanese model. She was born at Kawasaki, Kanagawa.
Her theme song during flashback sequences is based on the classic orchestra music, Ave Maria, which was originally titled Ellen's dritter Gesang, composed by Franz Schubert as part of his setting of seven songs from Walter Scott's popular epic poem, The Lady of the Lake.