羽衣石 姫子

Hobbies: Playing mahjong
Likes: Ramen (not the instant kind), smoking, gothic lolita fashion, hopeful young creators with dreams
Dislikes: Negative humans, formal situations (such as company meetings or gatherings), payment due dates

Toshiki's class's teacher. She mainly works as a novelist, as a screenwriter, and as a scenario writer for video games. Despite her blunt personality, she is popular with her students, and they often come to ask her for advice or help.
For some reason, she's always dressed up in gothic lolita clothing.

She has another pen name as "Haneishi Osamu (羽石 修)" for writing light novels.