Keiko Sasahara

This character is Kanji's younger sister who embraces a leisurely lifestyle while harboring a strong affection for Kousaka, causing some annoyance for Saki. She develops an interest in otaku culture after encountering dōjinshi, which leads her to explore that world. To be nearer to Kousaka and join Genshiken, she attempts to enter Shiiou University but ends up attending Ohka Business College instead.