Hanako Koyanagi (小柳 花子), 27, works alongside Narumi Momose and Hirotaka Nifuji. She possesses dark green hair, purple eyes, and stands 1.67 meters tall. Born August 28 with blood type AB, she led her high school girls' volleyball team as captain, showcasing athleticism and leadership. Her relationship with Tarō Kabakura (boys' volleyball captain) began when she approached him under the pretense of borrowing a book, her true goal being an invitation to a crossplay event—reflecting her established cosplay passion. She later playfully leveraged his accidental purchase of a yaoi doujinshi to secure his attendance, establishing their signature dynamic of mutual teasing and shared otaku enthusiasm. As an adult, Hanako openly embraces her otaku identity. Her primary hobbies include crossplaying (often as male characters) and creating boys' love content. She collaborates with Narumi on activities like drawing doujinshi for Comiket. Despite a professional and elegant appearance, she exhibits playful mischievousness, especially with Kabakura. Their relationship features frequent, loud arguments over otaku culture or minor issues, coexisting with a deep, longstanding commitment. Flashbacks trace the evolution of her bond with Kabakura from high school to its complex, enduring adult form. She occasionally removes her glasses in private, reflecting a shift to her relaxed self. Later, she facilitates social connections, like introducing Kō Sakuragi, and supports Narumi through personal struggles. Hanako consistently balances her office career with her otaku passions. Her relationship with Kabakura evolves beyond contentious banter to moments of vulnerability, revealing their underlying affection.