Age: 19
Birthday: October 15
Height: 170cm
Blood type: A
Zodiac: Libra

Kou is a friend of Hirotaka's little brother Nao. She has always been a loner playing video games until Nao approached her and asked her to teach him play a game Kou plays. Since she has been a loner for a long time she gets shy everytime Nao talks to her and has a tendency to apologize even though she didn't have to apologize for anything.

She also easily gets mistaken for a boy since she dressed like one, it's unclear if Nao knows the fact she's a girl or not.