Age: 16-17
Class: 2-A
Height: 168 cm
Weight: 55 kg
Birthday: August 1
Blood type: B

One of Junichi's childhood friends, and is often seen with his other friend Masayoshi. She is unpredictable as she would punch Junichi anytime. She works part-time at a Family Restaurant to support her single mother.

She is the main female character on the second arc in the anime.

Kaoru is the second heroine of Amagami - Precious Diary.