Kou Sakuragi  

, 桜城 光

Kou is friends with Hirotaka's brother Nao and has always been an introverted gamer. However, when Nao asked her to teach him how to play a game that she enjoys, Kou became more comfortable around others. Despite being shy for a long time, she tends to apologize excessively even when there is no need. Additionally, due to her appearance and clothing style, people often mistake her for a boy, which raises the question of whether Nao knows about her gender identity or not.